diff --git a/Makefile b/Makefile
index 274c3d3..f97671d 100644
--- a/Makefile
+++ b/Makefile
@@ -7,8 +7,10 @@ client/dist/index.html:
 build-client:	client/dist/index.html
 
 start-server:	build-client
+	-mkdir db.mount
 	docker compose up --build -d
 
 clean:
 	docker compose down
-	rm -r server/public/ client/dist/
+	-rm -r server/public/ client/dist/
+
diff --git a/client/src/components/NavBar.vue b/client/src/components/NavBar.vue
index e11af91..145a817 100644
--- a/client/src/components/NavBar.vue
+++ b/client/src/components/NavBar.vue
@@ -1,5 +1,7 @@
 <script setup lang="ts">
 import { RouterLink } from 'vue-router';
+import { state } from '../state'
+
 </script>
 <template>
     <nav class="navbar" role="navigation" aria-label="main navigation">
@@ -9,20 +11,27 @@ import { RouterLink } from 'vue-router';
         <div class="navbar-menu"></div>
         <div class="navbar-end">
             <div class="navbar-item">
-                <div class="buttons">
-                    <RouterLink to="/" v-if="$route.path === '/new-track'">
-                        <button class="button is-info">
-                            Go Back
-                        </button>
-                    </RouterLink>
+                <RouterLink to="/" v-if="$route.path === '/new-track'">
+                    <button class="button is-info">
+                        Go Back
+                    </button>
+                </RouterLink>
 
-                    <RouterLink to="/new-track" v-else>
-                        <button class="button is-primary">
-                            Add Track
-                        </button>
-                    </RouterLink>
-                </div>
+                <RouterLink to="/new-track" v-else>
+                    <button class="button is-primary">
+                        Add Track
+                    </button>
+                </RouterLink>
+            </div>
+            <div class="navbar-item">
+                <button class="button is-info" @click="state.logOut()">
+                    Log Out
+                </button>
+            </div>
+            <div class="navbar-item">
+                <!-- spacer -->
+                &nbsp;
             </div>
         </div>
     </nav>
-</template>
\ No newline at end of file
+</template>
diff --git a/client/src/components/TickComponent.vue b/client/src/components/TickComponent.vue
index 8b1d863..47d57e0 100644
--- a/client/src/components/TickComponent.vue
+++ b/client/src/components/TickComponent.vue
@@ -15,8 +15,8 @@ const className = computed(() => isSet.value ? "button is-rounded is-info" : "bu
 
 async function toggle() {
     if (isSet.value) {
-        await state.taskMarkedIncomplete(props.track, props.date)
+        await props.track.markIncomplete(props.date)
     } else
-        await state.taskCompleted(props.track, props.date)
+        await props.track.markComplete(props.date)
 }
 </script>
\ No newline at end of file
diff --git a/client/src/components/TrackIcon.vue b/client/src/components/TrackIcon.vue
index 273987e..e5aeabf 100644
--- a/client/src/components/TrackIcon.vue
+++ b/client/src/components/TrackIcon.vue
@@ -1,12 +1,12 @@
 <script setup lang="ts">
-import { state } from '../state';
+import { Track } from '../track';
 
 const props = defineProps<{icon: String, id: number|undefined}>()
 
 const del = () => {
     if(props.id)
         if(confirm("are you sure you want to delete this track?"))
-            state.removeTrack(props.id)
+            Track.deleteById(props.id)
 }
 </script>
 <template>
diff --git a/client/src/router.ts b/client/src/router.ts
index 806e60d..8d94d4c 100644
--- a/client/src/router.ts
+++ b/client/src/router.ts
@@ -6,7 +6,8 @@ const router = createRouter({
     history: createWebHistory(),
     routes: [
         { path: '/', component: TableView },
-        { path: '/new-track', component: NewTrackView }
+        { path: '/new-track', component: NewTrackView },
+        { path: '/login', component: import('./views/Login.vue') }
         // for other pages:
         // {path: '/', component: import('./views/TableView.vue')}
     ]
diff --git a/client/src/state.ts b/client/src/state.ts
index d449b60..028ae4b 100644
--- a/client/src/state.ts
+++ b/client/src/state.ts
@@ -2,6 +2,8 @@ import { reactive } from "vue"
 import { Track } from "./track"
 import { Tick } from './ticks'
 import { error } from "./error"
+import { getCookie } from "./util";
+import router from './router'
 
 enum State {
     Unfetched,
@@ -9,18 +11,22 @@ enum State {
     Fetched,
 }
 
-function dateQuery(date: Date): URLSearchParams {
-    let query = new URLSearchParams()
-    query.set("year", date.getUTCFullYear().toString())
-    query.set("month", (date.getUTCMonth() + 1).toString())
-    // good thing I still had this ^^^^^^^^^^^^^^ in mind when I wrote this 😬
-    query.set("day", date.getUTCDate().toString())
-    return query
+interface LoggedInUser {
+    name: string
 }
 
-export const state = reactive({
-    tracks: new Array<Track>,
-    state: State.Unfetched,
+class AppState {
+    tracks: Array<Track>
+    state: State
+    user?: LoggedInUser
+    source?: EventSource
+
+    constructor() {
+        this.tracks = new Array<Track>
+        this.state = State.Unfetched
+        const name = getCookie("name")
+        if (name) this.user = { name }
+    }
     streamUpdatesFromServer() {
         const source = new EventSource("/api/v1/updates")
         source.addEventListener("open", () => console.debug("opened event source"))
@@ -69,45 +75,30 @@ export const state = reactive({
             window.location = window.location
         })
         window.addEventListener('beforeunload', () => source.close())
-    },
+        this.source = source
+    }
     async repopulate() {
+        if (!this.user) {
+            this.tracks = []
+            return
+        }
         this.state = State.Fetching
         this.tracks = await Track.fetchAll()
-    },
+        this.source?.close()
+        this.streamUpdatesFromServer()
+        this.state = State.Fetched
+    }
     async populate() {
         if (this.state != State.Unfetched) return
         await this.repopulate()
-        this.streamUpdatesFromServer()
-        this.state = State.Fetched
-    },
-    async taskCompleted(track: Track, date: Date): Promise<Tick> {
-        const query = dateQuery(date)
-        const response: Response = await fetch(`/api/v1/tracks/${track.id}/ticked?${query.toString()}`, { method: "PATCH" })
-        const body = await response.text()
-        if (!response.ok) {
-            error(body)
-            throw new Error(`error setting tick for track ${track.id} ("${track.name}"): ${response.status} ${response.statusText}`)
-        }
-        return JSON.parse(body)
-    },
-    async taskMarkedIncomplete(track: Track, date: Date) {
-        const query = dateQuery(date)
-        const { ok, status, statusText } = await fetch(`/api/v1/tracks/${track.id}/all-ticks?${query.toString()}`, { method: 'DELETE' })
-        if (!ok)
-            error(`error deleting ticks for ${track.id}: ${statusText} (${status})`)
-    },
-    async addTrack(track: Track): Promise<boolean> {
-        const response = await fetch('/api/v1/tracks', {
-            method: "POST",
-            body: JSON.stringify(track),
-            headers: { "Content-Type": "application/json" }
-        })
-        if (!response.ok)
-            error(`error submitting track: ${track}: ${response.statusText} (${response.status})`)
-        return response.ok
-    },
-    async removeTrack(trackID: number) {
-        const response = await fetch(`/api/v1/tracks/${trackID}`, { method: "DELETE" })
-        if (!response.ok) error(`error deleting track with ID ${trackID}: ${response.statusText} (${response.status})`)
     }
-})
+    async logOut() {
+        const result = await fetch('/api/v1/auth', {method: 'DELETE'})
+        if(!result.ok) return error('failed to log out')
+        this.user = undefined
+        router.push('/login')
+    }
+}
+
+
+export const state = reactive(new AppState)
diff --git a/client/src/track.ts b/client/src/track.ts
index 83947a3..f7525ad 100644
--- a/client/src/track.ts
+++ b/client/src/track.ts
@@ -1,4 +1,6 @@
 import { error } from "./error"
+import { Tick, ITick } from './ticks'
+import { dateQuery } from "./util"
 
 export interface ITrack {
     id?: number
@@ -47,6 +49,34 @@ export class Track implements ITrack {
         this.fetchTicks = this.fetchTicks.bind(this)
     }
 
+    /**
+     * Add this track to the database. A `TrackAdded` event should have been
+     * received from the server on the event stream by the time this returns.
+     * 
+     * @returns whether or not the query succeeded
+     */
+    async create(): Promise<boolean> {
+        // note that this.id is expected to be `undefined` here.
+        const response = await fetch('/api/v1/tracks', {
+            method: "POST",
+            body: JSON.stringify(this),
+            headers: { "Content-Type": "application/json" }
+        })
+        if (!response.ok)
+            error(`error submitting track ${this.name}: ${response.statusText} (${response.status})`)
+        return response.ok
+    }
+
+    async delete() {
+        const id = this.id
+        if (id) await Track.deleteById(id)
+    }
+
+    static async deleteById(id: number) {
+        const response = await fetch(`/api/v1/tracks/${id}`, { method: "DELETE" })
+        if (!response.ok) error(`error deleting track with ID ${id}: ${response.statusText} (${response.status})`)
+    }
+
     static fromJSON(track: ITrack): Track {
         return new Track(track.id, track.name, track.description, track.icon, track.enabled, track.multiple_entries_per_day, track.color, track.order)
     }
@@ -97,4 +127,36 @@ export class Track implements ITrack {
         }
         return []
     }
-}
\ No newline at end of file
+    /**
+     * Mark this track as being completed on the given date. A `TickAdded` event
+     * should have been received from the server on the event stream by the time
+     * this returns.
+     * 
+     * @param date the date the task was completed
+     * @returns the decoded server API response
+     */
+    async markComplete(date: Date) {
+        const query = dateQuery(date)
+        const response: Response = await fetch(`/api/v1/tracks/${this.id}/ticked?${query.toString()}`, { method: "PATCH" })
+        const body = await response.text()
+        if (!response.ok) {
+            error(body)
+            throw new Error(`error setting tick for track ${this.id} ("${this.name}"): ${response.status} ${response.statusText}`)
+        }
+        return JSON.parse(body)
+    }
+    /**
+     * Mark this track as being incomplete on the given date. A `TickAdded` event
+     * should have been received from the server on the event stream by the time
+     * this returns.
+     * 
+     * @param date the date the task was completed
+     * @returns the decoded server API response
+     */
+    async markIncomplete(date: Date) {
+        const query = dateQuery(date)
+        const { ok, status, statusText } = await fetch(`/api/v1/tracks/${this.id}/all-ticks?${query.toString()}`, { method: 'DELETE' })
+        if (!ok)
+            error(`error deleting ticks for ${this.id}: ${statusText} (${status})`)
+    }
+}
diff --git a/client/src/util.ts b/client/src/util.ts
new file mode 100644
index 0000000..023079c
--- /dev/null
+++ b/client/src/util.ts
@@ -0,0 +1,17 @@
+export function getCookie(key: string): string | null {
+    const start = document.cookie.indexOf(key + '=')
+    if(start === -1) return null
+    let end: number | undefined = document.cookie.indexOf(';', start)
+    if(end === -1)
+        end = undefined
+    return document.cookie.substring(start + key.length + 1, end)
+}
+
+export function dateQuery(date: Date): URLSearchParams {
+    let query = new URLSearchParams()
+    query.set("year", date.getUTCFullYear().toString())
+    query.set("month", (date.getUTCMonth() + 1).toString())
+    // good thing I still had this ^^^^^^^^^^^^^^ in mind when I wrote this 😬
+    query.set("day", date.getUTCDate().toString())
+    return query
+}
diff --git a/client/src/views/Login.vue b/client/src/views/Login.vue
new file mode 100644
index 0000000..84d09b7
--- /dev/null
+++ b/client/src/views/Login.vue
@@ -0,0 +1,84 @@
+<script setup lang="ts">
+import { ref, computed } from 'vue'
+import { state } from '../state';
+import router from '../router'
+
+const $name = ref("")
+const $password = ref("")
+const signUpWait = ref(false)
+const loginWait = ref(false)
+const signUpClass = computed(() => `submit button is-success ${signUpWait.value ? 'is-loading' : ''}`)
+const loginClass = computed(() => `submit button is-info ${loginWait.value ? 'is-loading' : ''}`)
+
+async function signUp() {
+    const name = $name.value, password = $password.value
+    signUpWait.value = true
+    const result = await fetch("/api/v1/auth", {
+        method: 'POST',
+        body: JSON.stringify({ name, password }),
+        headers: {'Content-Type': 'application/json'}
+    })
+    if (result.ok) {
+        state.user = { name }
+        await state.repopulate()
+        router.push("/")
+    }
+}
+
+async function login() {
+    const name = $name.value, password = $password.value
+    loginWait.value = true
+    const result = await fetch("/api/v1/auth", {
+        method: 'PUT',
+        body: JSON.stringify({ name, password }),
+        headers: {'Content-Type': 'application/json'}
+    })
+    if (result.ok) {
+        state.user = { name }
+        await state.repopulate()
+        router.push("/")
+    }
+}
+
+if(state.user?.name) router.push("/")
+
+</script>
+<template>
+    <div class="modal is-active">
+        <div class="modal-background"></div>
+        <div class="modal-card">
+            <header class="modal-card-head">
+                <div class="modal-card-title">Log in or Sign up</div>
+            </header>
+            <section class="modal-card-body">
+                <div class="field">
+                    <label for="username" class=label>Name</label>
+                    <div class="control">
+                        <input type="text" name="username" class="input" v-model="$name" />
+                    </div>
+                </div>
+
+                <div class="field">
+                    <label for="password" class="label">Password</label>
+                    <div class="control">
+                        <input type="password" name="password" class="input" v-model="$password" />
+                    </div>
+                </div>
+            </section>
+            <footer class="modal-card-foot">
+                <button :class="loginClass" @click="login">Log in</button>
+                <button :class="signUpClass" @click="signUp">Sign Up</button>
+            </footer>
+        </div>
+    </div>
+</template>
+
+<style scoped>
+.modal-card-foot {
+    flex-direction: row-reverse;
+}
+
+.button.submit {
+    margin-left: 10px;
+}
+</style>
diff --git a/client/src/views/NewTrackView.vue b/client/src/views/NewTrackView.vue
index 8b2ed62..a15e26a 100644
--- a/client/src/views/NewTrackView.vue
+++ b/client/src/views/NewTrackView.vue
@@ -2,7 +2,6 @@
 import { RouterLink, useRouter } from 'vue-router';
 import { Track } from '../track';
 import { computed, ref } from 'vue';
-import { state } from '../state';
 
 const props = defineProps<{ initialState?: Track }>()
 const router = useRouter()
@@ -26,7 +25,7 @@ const submit = async () => {
     const track = new Track(undefined, name.value, description.value,
         icon.value, Number(enabled.value), Number(multipleEntriesPerDay.value),
         color.value, order.value)
-    if (await state.addTrack(track))
+    if (await track.create())
         router.push('/')
 }
 </script>
diff --git a/client/src/views/TableView.vue b/client/src/views/TableView.vue
index 053df35..f5afd39 100644
--- a/client/src/views/TableView.vue
+++ b/client/src/views/TableView.vue
@@ -1,5 +1,10 @@
 <script setup lang="ts">
 import Table from "../components/Table.vue";
+
+import { state } from '../state.ts'
+import router from '../router.ts'
+
+if(!state.user) router.push('/login')
 </script>
 
 <template>
diff --git a/docker-compose_dev.yml b/docker-compose_dev.yml
index 93d4bf1..ac3c228 100644
--- a/docker-compose_dev.yml
+++ b/docker-compose_dev.yml
@@ -14,7 +14,7 @@ services:
       POSTGRES_USER: kalkutago
       POSTGRES_DB: kalkutago
       POSTGRES_HOST: database
-    secrets: [ postgres-password ]
+    secrets: [ postgres-password, cookie-secret ]
     depends_on: [ database ]
     expose: [ 8000 ]
       # ports:
@@ -25,6 +25,7 @@ services:
     labels:
       traefik.enable: true
       traefik.http.routers.kalkutago_server.rule: 'Host(`kalkutago`) && PathPrefix(`/api`)'
+
   database:
     image: postgres
     environment:
@@ -65,6 +66,8 @@ services:
 secrets:
   postgres-password:
     file: ./server/postgres.pw
+  cookie-secret:
+    file: ./server/cookie-secret.pw
 
 networks:
   internal:
diff --git a/docker-compose_prod.yml b/docker-compose_prod.yml
index cb57656..09483f7 100644
--- a/docker-compose_prod.yml
+++ b/docker-compose_prod.yml
@@ -14,7 +14,7 @@ services:
       POSTGRES_USER: kalkutago
       POSTGRES_DB: kalkutago
       POSTGRES_HOST: database
-    secrets: [ postgres-password ]
+    secrets: [ postgres-password, cookie-secret ]
     depends_on: [ database ]
     volumes:
       - ./client/dist:/src/public:ro
@@ -32,6 +32,8 @@ services:
 secrets:
   postgres-password:
     file: ./server/postgres.pw
+  cookie-secret:
+    file: ./server/cookie-secret.pw
 
 networks:
   internal:
diff --git a/docker-compose_test.yml b/docker-compose_test.yml
new file mode 100644
index 0000000..2fce6d8
--- /dev/null
+++ b/docker-compose_test.yml
@@ -0,0 +1,45 @@
+version: "3.5"
+
+services:
+  server:
+    build:
+      context: ./server
+      dockerfile: Dockerfile.test
+    networks:
+     - web
+     - internal
+    environment:
+      POSTGRES_PASSWORD_FILE: /run/secrets/postgres-password
+      POSTGRES_USER: kalkutago
+      POSTGRES_DB: kalkutago_TEST
+      POSTGRES_HOST: database
+    secrets: [ postgres-password, cookie-secret ]
+    depends_on: [ database ]
+    expose: [ 8000 ]
+    volumes:
+      - ./client/dist:/src/public:ro
+    labels:
+      traefik.enable: false
+
+  database:
+    image: postgres
+    environment:
+      POSTGRES_PASSWORD_FILE: /run/secrets/postgres-password
+      POSTGRES_USER: kalkutago
+      POSTGRES_DB: kalkutago_TEST
+    secrets: [ postgres-password ]
+    networks: [ internal ]
+    labels:
+      traefik.enable: false
+
+secrets:
+  postgres-password:
+    file: ${PG_PW_FILE}
+  cookie-secret:
+    file: ${COOKIE_SECRET_FILE}
+
+networks:
+  internal:
+    internal: true
+  web:
+    external: true
diff --git a/server/Cargo.lock b/server/Cargo.lock
index 59054fd..0622b98 100644
--- a/server/Cargo.lock
+++ b/server/Cargo.lock
@@ -8,6 +8,41 @@ version = "0.11.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fe438c63458706e03479442743baae6c88256498e6431708f6dfc520a26515d3"
 
+[[package]]
+name = "aead"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d122413f284cf2d62fb1b7db97e02edb8cda96d769b16e443a4f6195e35662b0"
+dependencies = [
+ "crypto-common",
+ "generic-array",
+]
+
+[[package]]
+name = "aes"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "433cfd6710c9986c576a25ca913c39d66a6474107b406f34f91d4a8923395241"
+dependencies = [
+ "cfg-if",
+ "cipher",
+ "cpufeatures",
+]
+
+[[package]]
+name = "aes-gcm"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "209b47e8954a928e1d72e86eca7000ebb6655fe1436d33eefc2201cad027e237"
+dependencies = [
+ "aead",
+ "aes",
+ "cipher",
+ "ctr",
+ "ghash",
+ "subtle",
+]
+
 [[package]]
 name = "ahash"
 version = "0.7.6"
@@ -142,6 +177,19 @@ version = "0.21.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "604178f6c5c21f02dc555784810edfb88d34ac2c73b2eae109655649ee73ce3d"
 
+[[package]]
+name = "bcrypt"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9df288bec72232f78c1ec5fe4e8f1d108aa0265476e93097593c803c8c02062a"
+dependencies = [
+ "base64 0.21.2",
+ "blowfish",
+ "getrandom",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "bigdecimal"
 version = "0.3.1"
@@ -192,6 +240,16 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "blowfish"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e412e2cd0f2b2d93e02543ceae7917b3c70331573df19ee046bcbc35e45e87d7"
+dependencies = [
+ "byteorder",
+ "cipher",
+]
+
 [[package]]
 name = "borsh"
 version = "0.10.3"
@@ -305,6 +363,16 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "cipher"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "773f3b9af64447d2ce9850330c473515014aa235e6a783b02db81ff39e4a3dad"
+dependencies = [
+ "crypto-common",
+ "inout",
+]
+
 [[package]]
 name = "clap"
 version = "3.2.25"
@@ -347,7 +415,13 @@ version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7efb37c3e1ccb1ff97164ad95ac1606e8ccd35b3fa0a7d99a304c7f4a428cc24"
 dependencies = [
+ "aes-gcm",
+ "base64 0.21.2",
+ "hkdf",
  "percent-encoding",
+ "rand",
+ "sha2",
+ "subtle",
  "time 0.3.22",
  "version_check",
 ]
@@ -393,9 +467,19 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1bfb12502f3fc46cca1bb51ac28df9d618d813cdc3d2f25b9fe775a34af26bb3"
 dependencies = [
  "generic-array",
+ "rand_core",
  "typenum",
 ]
 
+[[package]]
+name = "ctr"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0369ee1ad671834580515889b80f2ea915f23b8be8d0daa4bbaf2ac5c7590835"
+dependencies = [
+ "cipher",
+]
+
 [[package]]
 name = "darling"
 version = "0.14.4"
@@ -462,6 +546,17 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "derive_deref"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dcdbcee2d9941369faba772587a565f4f534e42cb8d17e5295871de730163b2b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "devise"
 version = "0.4.1"
@@ -756,6 +851,16 @@ dependencies = [
  "wasi 0.11.0+wasi-snapshot-preview1",
 ]
 
+[[package]]
+name = "ghash"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d930750de5717d2dd0b8c0d42c076c0e884c81a73e6cab859bbd2339c71e3e40"
+dependencies = [
+ "opaque-debug",
+ "polyval",
+]
+
 [[package]]
 name = "glob"
 version = "0.3.1"
@@ -989,6 +1094,15 @@ version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c8fae54786f62fb2918dcfae3d568594e50eb9b5c25bf04371af6fe7516452fb"
 
+[[package]]
+name = "inout"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a0c10553d664a4d0bcff9f4215d0aac67a639cc68ef660840afe309b807bc9f5"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "instant"
 version = "0.1.12"
@@ -1049,8 +1163,10 @@ dependencies = [
 name = "kalkutago-server"
 version = "0.1.0"
 dependencies = [
+ "bcrypt",
  "chrono",
  "derive_builder",
+ "derive_deref",
  "either",
  "femme",
  "log",
@@ -1061,6 +1177,7 @@ dependencies = [
  "serde_json",
  "thiserror",
  "tokio",
+ "tokio-test",
 ]
 
 [[package]]
@@ -1249,6 +1366,12 @@ version = "1.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
 
+[[package]]
+name = "opaque-debug"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
+
 [[package]]
 name = "os_str_bytes"
 version = "6.5.1"
@@ -1379,6 +1502,18 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "polyval"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ef234e08c11dfcb2e56f79fd70f6f2eb7f025c0ce2333e82f4f0518ecad30c6"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "opaque-debug",
+ "universal-hash",
+]
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.17"
@@ -2503,6 +2638,19 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tokio-test"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53474327ae5e166530d17f2d956afcb4f8a004de581b3cae10f12006bc8163e3"
+dependencies = [
+ "async-stream",
+ "bytes",
+ "futures-core",
+ "tokio",
+ "tokio-stream",
+]
+
 [[package]]
 name = "tokio-util"
 version = "0.7.8"
@@ -2699,6 +2847,16 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39ec24b3121d976906ece63c9daad25b85969647682eee313cb5779fdd69e14e"
 
+[[package]]
+name = "universal-hash"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc1de2c688dc15305988b563c3854064043356019f97a4b46276fe734c4f07ea"
+dependencies = [
+ "crypto-common",
+ "subtle",
+]
+
 [[package]]
 name = "untrusted"
 version = "0.7.1"
@@ -3010,3 +3168,9 @@ name = "yansi"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09041cd90cf85f7f8b2df60c646f853b7f535ce68f85244eb6731cf89fa498ec"
+
+[[package]]
+name = "zeroize"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a0956f1ba7c7909bfb66c2e9e4124ab6f6482560f6628b5aaeba39207c9aad9"
diff --git a/server/Cargo.toml b/server/Cargo.toml
index eddfb63..d2d627a 100644
--- a/server/Cargo.toml
+++ b/server/Cargo.toml
@@ -13,12 +13,15 @@ path = "src/main.rs"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+bcrypt = "0.14.0"
 chrono = "0.4.26"
+derive_deref = "1.1.1"
 femme = "2.2.1"
 log = { version = "0.4.19", features = ["kv_unstable", "kv_unstable_serde"] }
 sea-orm-migration = "0.11.3"
 serde_json = "1.0.96"
 thiserror = "1.0.40"
+tokio-test = "0.4.2"
 
 [dependencies.derive_builder]
 version = "0.12.0"
@@ -40,7 +43,7 @@ features = [
 [dependencies.rocket]
 git = "https://github.com/SergioBenitez/Rocket"
 rev = "v0.5.0-rc.3"
-features = ["json"]
+features = ["json", "secrets"]
 
 [dependencies.serde]
 version = "1.0.163"
diff --git a/server/src/api/auth.rs b/server/src/api/auth.rs
new file mode 100644
index 0000000..415a122
--- /dev/null
+++ b/server/src/api/auth.rs
@@ -0,0 +1,116 @@
+use derive_deref::Deref;
+use either::Either::{self, Right};
+
+use log::{as_debug, as_serde, debug};
+use rocket::{
+    http::{Cookie, CookieJar, Status},
+    outcome::IntoOutcome,
+    request::{self, FromRequest},
+    serde::json::Json,
+    Request, State,
+};
+use sea_orm::{prelude::*, DatabaseConnection};
+use serde::{Deserialize, Serialize};
+
+use crate::{
+    api::error::ApiResult,
+    entities::{prelude::*, *},
+    error::Error,
+};
+
+use super::ErrorResponder;
+
+#[derive(Clone, Deserialize, Serialize)]
+pub struct LoginData {
+    pub name: String,
+    pub password: String,
+}
+
+#[put("/", data = "<user_data>", format = "application/json")]
+pub(super) async fn login(
+    db: &State<DatabaseConnection>,
+    user_data: Json<LoginData>,
+    cookies: &CookieJar<'_>,
+) -> Result<Status, Either<Status, ErrorResponder>> {
+    let user = Users::find()
+        .filter(users::Column::Name.eq(&user_data.name))
+        .one(db as &DatabaseConnection)
+        .await
+        .map_err(|err| Right(Error::from(err).into()))?;
+    let Some(user) = user else {
+        info!(name = user_data.name; "no user found with the given name");
+        return Ok(Status::Unauthorized);
+    };
+    let user = user.check_password(&user_data.password)?;
+    cookies.add_private(Cookie::new(
+        "user",
+        serde_json::to_string(&user).map_err(|err| Right(Error::from(err).into()))?,
+    ));
+    cookies.add(Cookie::new("name", user.name));
+    Ok(Status::Ok)
+}
+
+#[post("/", data = "<user_data>", format = "application/json")]
+pub(super) async fn sign_up(
+    db: &State<DatabaseConnection>,
+    user_data: Json<LoginData>,
+    cookies: &CookieJar<'_>,
+) -> ApiResult<()> {
+    let user_data = users::ActiveModel::new(&user_data.name, &user_data.password)?
+        .insert(db as &DatabaseConnection)
+        .await
+        .map_err(Error::from)?;
+    debug!(user = as_serde!(user_data); "user added");
+    cookies.add_private(Cookie::new(
+        "user",
+        serde_json::to_string(&user_data).map_err(Error::from)?,
+    ));
+    cookies.add(Cookie::new("name", user_data.name));
+    Ok(())
+}
+
+#[delete("/")]
+pub(super) async fn sign_out(cookies: &CookieJar<'_>) {
+    cookies.remove_private(Cookie::named("user"));
+    cookies.remove(Cookie::named("name"));
+}
+
+/// Authentication guard
+#[derive(Deref)]
+pub(super) struct Auth(users::Model);
+
+#[derive(Deserialize)]
+struct AuthData {
+    id: i32,
+    name: String,
+    password_hash: String,
+}
+
+impl From<AuthData> for Auth {
+    fn from(value: AuthData) -> Self {
+        Auth(users::Model {
+            id: value.id,
+            name: value.name,
+            password_hash: value.password_hash,
+        })
+    }
+}
+
+#[rocket::async_trait]
+impl<'r> FromRequest<'r> for Auth {
+    type Error = ();
+    async fn from_request(request: &'r Request<'_>) -> request::Outcome<Self, Self::Error> {
+        let unauthorized = (Status::Unauthorized, ());
+        let Some(user) = request.cookies().get_private("user") else {
+            return request::Outcome::Failure(unauthorized);
+        };
+        let user = user.value();
+        debug!(user = user; "user retreived from private cookie");
+        let result = serde_json::from_str(user)
+            .ok()
+            .map(|model: AuthData| model.into())
+            .into_outcome(unauthorized);
+        debug!(result = as_debug!(result); "auth FromRequest return value");
+        result
+    }
+}
diff --git a/server/src/api/error.rs b/server/src/api/error.rs
index 602ca1d..5689ed4 100644
--- a/server/src/api/error.rs
+++ b/server/src/api/error.rs
@@ -2,11 +2,11 @@ use crate::error::Error;
 
 #[derive(Responder)]
 #[response(status = 500, content_type = "json")]
-pub(crate) struct ErrorResponder {
+pub struct ErrorResponder {
     message: String,
 }
 
-pub(crate) type ApiResult<T> = Result<T, ErrorResponder>;
+pub type ApiResult<T> = Result<T, ErrorResponder>;
 
 // The following impl's are for easy conversion of error types.
 
diff --git a/server/src/api/mod.rs b/server/src/api/mod.rs
index bec41f1..eaae998 100644
--- a/server/src/api/mod.rs
+++ b/server/src/api/mod.rs
@@ -1,3 +1,4 @@
+mod auth;
 mod error;
 mod groups;
 #[cfg(feature = "unsafe_import")]
@@ -7,12 +8,14 @@ mod tracks;
 pub(crate) mod update;
 
 use std::{
-    default::default,
+    default::Default,
+    env, fs,
     net::{IpAddr, Ipv4Addr},
 };
 
 use crate::error::Error;
 use rocket::{
+    config::SecretKey,
     fs::{FileServer, NamedFile},
     response::stream::EventStream,
     routes, Build, Config, Rocket, State,
@@ -25,6 +28,8 @@ use tokio::sync::broadcast::{self, error::RecvError, Sender};
 use self::{error::ApiResult, update::Update};
 use log::{as_debug, as_serde, debug, trace};
 
+pub use auth::LoginData;
+
 #[get("/status")]
 fn status() -> &'static str {
     "Ok"
@@ -61,7 +66,17 @@ async fn spa_index_redirect() -> ApiResult<NamedFile> {
         .map_err(Error::from)?)
 }
 
-pub(crate) fn start_server(db: DatabaseConnection) -> Rocket<Build> {
+fn get_secret() -> [u8; 32] {
+    let path =
+        env::var("COOKIE_SECRET_FILE").unwrap_or_else(|_| "/run/secrets/cookie-secret".into());
+    let file_contents =
+        fs::read(&path).unwrap_or_else(|err| panic!("failed to read from {path:?}: {err:?}"));
+    let mut data = [0u8; 32];
+    data.copy_from_slice(&file_contents);
+    data
+}
+
+pub fn start_server(db: DatabaseConnection) -> Rocket<Build> {
     use groups::*;
     use ticks::*;
     use tracks::*;
@@ -69,7 +84,8 @@ pub(crate) fn start_server(db: DatabaseConnection) -> Rocket<Build> {
     let it = rocket::build()
         .configure(Config {
             address: IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)),
-            ..default()
+            secret_key: SecretKey::derive_from(&get_secret()),
+            ..Config::default()
         })
         .register("/", catchers![spa_index_redirect])
         .manage(db)
@@ -98,6 +114,7 @@ pub(crate) fn start_server(db: DatabaseConnection) -> Rocket<Build> {
             "/api/v1/groups",
             routes![all_groups, group, insert_group, update_group, delete_group],
         )
+        .mount("/api/v1/auth", routes![auth::login, auth::sign_up, auth::sign_out])
         .mount("/", FileServer::from("/src/public"));
 
     #[cfg(feature = "unsafe_import")]
diff --git a/server/src/api/tracks.rs b/server/src/api/tracks.rs
index edfa616..5d01ea5 100644
--- a/server/src/api/tracks.rs
+++ b/server/src/api/tracks.rs
@@ -1,51 +1,71 @@
+use crate::api::auth::Auth;
 use crate::api::{self, error::ApiResult};
 use crate::entities::{prelude::*, *};
 use crate::error::Error;
 use either::Either::{self, Left, Right};
+use log::as_debug;
+use log::{as_serde, debug, warn};
 use rocket::http::Status;
 use rocket::{serde::json::Json, State};
-use sea_orm::{prelude::*, DatabaseConnection};
+use sea_orm::{prelude::*, DatabaseConnection, IntoActiveModel, Statement};
 use tokio::sync::broadcast::Sender;
 
 use super::update::Update;
+use super::ErrorResponder;
 
 #[get("/")]
 pub(super) async fn all_tracks(
     db: &State<DatabaseConnection>,
+    authorized_user: Auth,
 ) -> ApiResult<Json<Vec<tracks::Model>>> {
     let db = db as &DatabaseConnection;
-    let tracks = Tracks::find().all(db).await.unwrap();
+    let tracks = authorized_user
+        .find_related(Tracks)
+        .all(db)
+        .await
+        .map_err(Error::from)?;
     Ok(Json(tracks))
 }
 
+async fn get_track_check_user(
+    db: &DatabaseConnection,
+    track_id: i32,
+    user: &users::Model,
+) -> Result<Json<tracks::Model>, Either<Status, api::ErrorResponder>> {
+    if let Some(Some(track)) = user
+        .find_related(Tracks)
+        .filter(tracks::Column::Id.eq(track_id))
+        .one(db)
+        .await
+        .transpose()
+        .map(|it| it.ok())
+    {
+        Ok(Json(track))
+    } else {
+        Err(Left(Status::NotFound))
+    }
+}
+
 #[get("/<id>")]
 pub(super) async fn track(
     db: &State<DatabaseConnection>,
     id: i32,
+    auth: Auth,
 ) -> Result<Json<tracks::Model>, Either<Status, api::ErrorResponder>> {
-    let db = db as &DatabaseConnection;
-    match Tracks::find_by_id(id).one(db).await {
-        Ok(Some(track)) => Ok(Json(track)),
-        Ok(None) => Err(Left(Status::NotFound)),
-        Err(err) => Err(Right(Error::from(err).into())),
-    }
+    get_track_check_user(db, id, &auth).await
 }
 
 #[get("/<id>/ticks")]
 pub(super) async fn ticks_for_track(
     db: &State<DatabaseConnection>,
     id: i32,
+    auth: Auth,
 ) -> Result<Json<Vec<ticks::Model>>, Either<Status, api::ErrorResponder>> {
     let db = db as &DatabaseConnection;
-    match Tracks::find_by_id(id).one(db).await {
-        Ok(Some(track)) => {
-            let result = track.find_related(Ticks).all(db).await;
-            match result {
-                Ok(ticks) => Ok(Json(ticks)),
-                Err(err) => Err(Right(Error::from(err).into())),
-            }
-        }
-        Ok(None) => Err(Left(Status::NotFound)),
+    let track = get_track_check_user(db, id, &auth).await?;
+    let result = track.find_related(Ticks).all(db).await;
+    match result {
+        Ok(ticks) => Ok(Json(ticks)),
         Err(err) => Err(Right(Error::from(err).into())),
     }
 }
@@ -55,13 +75,87 @@ pub(super) async fn insert_track(
     db: &State<DatabaseConnection>,
     tx: &State<Sender<Update>>,
     track: Json<serde_json::Value>,
-) -> ApiResult<Json<tracks::Model>> {
-    let track = track.0;
-    let db = db as &DatabaseConnection;
-    let model = tracks::ActiveModel::from_json(track).map_err(Error::from)?;
-    let track = model.insert(db).await.map_err(Error::from)?;
-    tx.send(Update::track_added(track.clone()))
-        .map_err(Error::from)?;
+    auth: Auth,
+) -> Result<Json<tracks::Model>, Either<Status, ErrorResponder>> {
+    debug!(
+        user=as_serde!(*auth),
+        track=as_serde!(track.0);
+        "authenticated user making track insertion request"
+    );
+    fn bad() -> Either<Status, ErrorResponder> {
+        Left(Status::BadRequest)
+    }
+    fn bad_value_for(key: &'static str) -> impl Fn() -> Either<Status, ErrorResponder> {
+        move || {
+            warn!(key = key; "bad value");
+            bad()
+        }
+    }
+    let track = track.0.as_object().ok_or_else(|| {
+        warn!("received value was not an object");
+        bad()
+    })?;
+    let Some(track_id) = db
+        .query_one(Statement::from_sql_and_values(
+            sea_orm::DatabaseBackend::Postgres,
+            r#"with track_insertion as (
+                    insert into tracks (name, description, icon, enabled,
+                        multiple_entries_per_day, color, "order"
+                    ) values (
+                        $2, $3, $4, $5, $6, $7, $8
+                    ) returning id
+                )
+            insert into user_tracks (
+                user_id, track_id
+            ) select $1, ti.id
+            from track_insertion ti
+            join track_insertion using (id)
+            returning id;"#,
+            [
+                auth.id.into(),
+                track
+                    .get("name")
+                    .ok_or_else(bad_value_for("name"))?
+                    .as_str()
+                    .ok_or_else(bad_value_for("name"))?
+                    .into(),
+                track
+                    .get("description")
+                    .ok_or_else(bad_value_for("description"))?
+                    .as_str()
+                    .ok_or_else(bad_value_for("description"))?
+                    .into(),
+                track
+                    .get("icon")
+                    .ok_or_else(bad_value_for("icon"))?
+                    .as_str()
+                    .ok_or_else(bad_value_for("icon"))?
+                    .into(),
+                track.get("enabled").and_then(|it| it.as_i64()).into(),
+                track
+                    .get("multiple_entries_per_day")
+                    .and_then(|it| it.as_i64())
+                    .into(),
+                track.get("color").and_then(|it| it.as_i64()).into(),
+                track.get("order").and_then(|it| it.as_i64()).into(),
+            ],
+        ))
+        .await
+        .map_err(|err| Right(Error::from(err).into()))?
+    else {
+        return Err(Right("no value returned from track insertion query".into()));
+    };
+    trace!("query completed");
+    let track_id = track_id
+        .try_get_by_index(0)
+        .map_err(|err| Right(Error::from(err).into()))?;
+    trace!(track_id = track_id; "freshly inserted track ID");
+    let track = auth.authorized_track(track_id, db).await.ok_or_else(|| {
+        Right(format!("failed to fetch freshly inserted track with id {track_id}").into())
+    })?;
+    if let Err(err) = tx.send(Update::track_added(track.clone())) {
+        warn!(err = as_debug!(err); "error sending updates to subscribed channels");
+    }
     Ok(Json(track))
 }
 
@@ -69,16 +163,22 @@ pub(super) async fn insert_track(
 pub(super) async fn update_track(
     db: &State<DatabaseConnection>,
     tx: &State<Sender<Update>>,
-    track: Json<serde_json::Value>,
-) -> ApiResult<Json<tracks::Model>> {
+    track: Json<tracks::Model>,
+    authorized_user: Auth,
+) -> Result<Json<tracks::Model>, Either<Status, api::ErrorResponder>> {
     let db = db as &DatabaseConnection;
-    let track = tracks::ActiveModel::from_json(track.0)
-        .map_err(Error::from)?
+    let track = track.0;
+    if !authorized_user.is_authorized_for(track.id, db).await {
+        return Err(Left(Status::Forbidden));
+    }
+    let track = track
+        .into_active_model()
         .update(db)
         .await
-        .map_err(Error::from)?;
-    tx.send(Update::track_changed(track.clone()))
-        .map_err(Error::from)?;
+        .map_err(|err| Right(Error::from(err).into()))?;
+    if let Err(err) = tx.send(Update::track_changed(track.clone())) {
+        warn!(err = as_debug!(err); "error sending updates to subscribed channels");
+    }
     Ok(Json(track))
 }
 
@@ -87,11 +187,13 @@ pub(super) async fn delete_track(
     db: &State<DatabaseConnection>,
     tx: &State<Sender<Update>>,
     id: i32,
+    authorized_user: Auth,
 ) -> ApiResult<Status> {
     let db = db as &DatabaseConnection;
-    let Some(track) = Tracks::find_by_id(id).one(db).await.map_err(Error::from)? else {
+    let Some(track) = authorized_user.authorized_track(id, db).await else {
         return Ok(Status::NotFound);
     };
+    track.clone().delete(db).await.map_err(Error::from)?;
     tx.send(Update::track_removed(track)).map_err(Error::from)?;
     Ok(Status::Ok)
 }
@@ -101,15 +203,20 @@ pub(super) async fn ticked(
     db: &State<DatabaseConnection>,
     tx: &State<Sender<Update>>,
     id: i32,
-) -> ApiResult<Json<ticks::Model>> {
+    authorized_user: Auth,
+) -> Result<Json<ticks::Model>, Either<Status, api::ErrorResponder>> {
+    if !authorized_user.is_authorized_for(id, db).await {
+        return Err(Left(Status::Forbidden));
+    }
+
     let tick = ticks::ActiveModel::now(id);
     let tick = tick
         .insert(db as &DatabaseConnection)
         .await
-        .map_err(Error::from)?
-        .to_owned();
-    tx.send(Update::tick_added(tick.clone()))
-        .map_err(Error::from)?;
+        .map_err(|err| Right(Error::from(err).into()))?;
+    if let Err(err) = tx.send(Update::tick_added(tick.clone())) {
+        warn!(err = as_debug!(err); "error sending updates to subscribed channels");
+    }
     Ok(Json(tick))
 }
 
@@ -121,7 +228,12 @@ pub(super) async fn ticked_on_date(
     year: i32,
     month: u32,
     day: u32,
+    authorized_user: Auth,
 ) -> ApiResult<Either<Json<ticks::Model>, Status>> {
+    if !authorized_user.is_authorized_for(id, db).await {
+        return Ok(Right(Status::Forbidden));
+    }
+
     let Some(date) = Date::from_ymd_opt(year, month, day) else {
         return Ok(Right(Status::BadRequest));
     };
@@ -129,10 +241,10 @@ pub(super) async fn ticked_on_date(
     let tick = tick
         .insert(db as &DatabaseConnection)
         .await
-        .map_err(Error::from)?
-        .to_owned();
-    tx.send(Update::tick_added(tick.clone()))
         .map_err(Error::from)?;
+    if let Err(err) = tx.send(Update::tick_added(tick.clone())) {
+        warn!(err = as_debug!(err); "error sending updates to subscribed channels");
+    }
     Ok(Left(Json(tick)))
 }
 
@@ -141,10 +253,14 @@ pub(super) async fn clear_all_ticks(
     db: &State<DatabaseConnection>,
     tx: &State<Sender<Update>>,
     id: i32,
+    authorized_user: Auth,
 ) -> ApiResult<Either<Status, Json<Vec<ticks::Model>>>> {
     let db = db as &DatabaseConnection;
-    let Some(track) = Tracks::find_by_id(id).one(db).await.map_err(Error::from)? else {
-        info!(track_id = id; "couldn't drop all ticks for track; track not found");
+    let Some(track) = authorized_user.authorized_track(id, db).await else {
+        info!(
+            track_id = id, user_id = authorized_user.id;
+            "couldn't drop all ticks for track; track not found or user not authorized"
+        );
         return Ok(Left(Status::NotFound));
     };
     let ticks = track
@@ -154,7 +270,9 @@ pub(super) async fn clear_all_ticks(
         .map_err(Error::from)?;
     for tick in ticks.clone() {
         tick.clone().delete(db).await.map_err(Error::from)?;
-        Update::tick_cancelled(tick).send(&tx)?;
+        if let Err(err) = Update::tick_cancelled(tick).send(tx) {
+            warn!(err = as_debug!(err); "error sending updates to subscribed channels");
+        }
     }
     Ok(Right(Json(ticks)))
 }
@@ -167,8 +285,12 @@ pub(super) async fn clear_all_ticks_on_day(
     year: i32,
     month: u32,
     day: u32,
-) -> ApiResult<Json<Vec<ticks::Model>>> {
+    authorized_user: Auth,
+) -> ApiResult<Either<Status, Json<Vec<ticks::Model>>>> {
     let db = db as &DatabaseConnection;
+    if !authorized_user.is_authorized_for(id, db).await {
+        return Ok(Left(Status::Forbidden));
+    }
     let ticks = Ticks::find()
         .filter(ticks::Column::TrackId.eq(id))
         .filter(ticks::Column::Year.eq(year))
@@ -179,7 +301,9 @@ pub(super) async fn clear_all_ticks_on_day(
         .map_err(Error::from)?;
     for tick in ticks.clone() {
         tick.clone().delete(db).await.map_err(Error::from)?;
-        Update::tick_cancelled(tick).send(&tx)?;
+        if let Err(err) = Update::tick_cancelled(tick).send(tx) {
+            warn!(err = as_debug!(err); "error sending updates to subscribed channels");
+        }
     }
-    Ok(Json(ticks))
+    Ok(Right(Json(ticks)))
 }
diff --git a/server/src/api/update.rs b/server/src/api/update.rs
index 1135c18..7cacb7b 100644
--- a/server/src/api/update.rs
+++ b/server/src/api/update.rs
@@ -91,8 +91,14 @@ impl Update {
     }
 
     pub fn send(self, tx: &Sender<Self>) -> Result<()> {
-        let count = tx.send(self.clone())?;
-        trace!(sent_to = count, update = as_serde!(self); "sent update to SSE channel");
+        let receiver_count = tx.receiver_count();
+        if receiver_count > 0 {
+            trace!(receiver_count = receiver_count, update = as_serde!(self); "sending update");
+            let count = tx.send(self.clone())?;
+            trace!(count = count; "update sent");
+        } else {
+            trace!("no update receivers, skipping message");
+        }
         Ok(())
     }
 }
diff --git a/server/src/db/mod.rs b/server/src/db/mod.rs
index b141c4f..fda857d 100644
--- a/server/src/db/mod.rs
+++ b/server/src/db/mod.rs
@@ -1,11 +1,15 @@
+use crate::migrator::Migrator;
+use sea_orm_migration::MigratorTrait;
+use sea_orm_migration::SchemaManager;
 use std::{
-    default::default,
     env,
     ffi::{OsStr, OsString},
     fs::File,
     io::Read,
 };
 
+use sea_orm::{Database, DatabaseConnection};
+
 // from https://doc.rust-lang.org/std/ffi/struct.OsString.html
 fn concat_os_strings(a: &OsStr, b: &OsStr) -> OsString {
     let mut ret = OsString::with_capacity(a.len() + b.len()); // This will allocate
@@ -30,7 +34,7 @@ fn get_env_var_or_file<A: AsRef<OsStr>>(key: A) -> Option<String> {
     if let Some(path) = env::var_os(file_key) {
         // open the file and read it
         let mut file = File::open(&path).unwrap_or_else(|_| panic!("no such file at {path:?}"));
-        let mut val: String = default();
+        let mut val = String::new();
         file.read_to_string(&mut val)
             .unwrap_or_else(|_| panic!("reading file at {path:?}"));
         Some(val)
@@ -58,3 +62,31 @@ pub fn connection_url() -> String {
         .unwrap_or(5432_u16);
     format!("postgres://{user}:{password}@{host}:{port}/{db}")
 }
+
+pub async fn connection() -> DatabaseConnection {
+    Database::connect(connection_url())
+        .await
+        .expect("db connection")
+}
+pub async fn migrated() -> DatabaseConnection {
+    let db = connection().await;
+    let schema_manager = SchemaManager::new(&db);
+    Migrator::refresh(&db).await.expect("migration");
+    assert!(schema_manager
+        .has_table("tracks")
+        .await
+        .expect("fetch tracks table"));
+    assert!(schema_manager
+        .has_table("ticks")
+        .await
+        .expect("fetch ticks table"));
+    assert!(schema_manager
+        .has_table("groups")
+        .await
+        .expect("fetch groups table"));
+    assert!(schema_manager
+        .has_table("track2_groups")
+        .await
+        .expect("fetch track2groups table"));
+    db
+}
diff --git a/server/src/entities/mod.rs b/server/src/entities/mod.rs
index 7a309af..c9107ae 100644
--- a/server/src/entities/mod.rs
+++ b/server/src/entities/mod.rs
@@ -6,3 +6,5 @@ pub mod groups;
 pub mod ticks;
 pub mod track2_groups;
 pub mod tracks;
+pub mod user_tracks;
+pub mod users;
diff --git a/server/src/entities/prelude.rs b/server/src/entities/prelude.rs
index 796df22..5b17141 100644
--- a/server/src/entities/prelude.rs
+++ b/server/src/entities/prelude.rs
@@ -4,3 +4,5 @@ pub use super::groups::Entity as Groups;
 pub use super::ticks::Entity as Ticks;
 pub use super::track2_groups::Entity as Track2Groups;
 pub use super::tracks::Entity as Tracks;
+pub use super::user_tracks::Entity as UserTracks;
+pub use super::users::Entity as Users;
diff --git a/server/src/entities/ticks.rs b/server/src/entities/ticks.rs
index 41d4107..7734cf8 100644
--- a/server/src/entities/ticks.rs
+++ b/server/src/entities/ticks.rs
@@ -1,6 +1,6 @@
 //! `SeaORM` Entity. Generated by sea-orm-codegen 0.11.3
 
-use std::default::default;
+use std::default::Default;
 
 use chrono::{Datelike, Timelike, Utc};
 use sea_orm::entity::prelude::*;
@@ -60,7 +60,7 @@ impl ActiveModel {
             minute: Set(now.minute().try_into().ok()),
             second: Set(now.second().try_into().ok()),
             has_time_info: Set(Some(1)),
-            ..default()
+            ..Default::default()
         }
     }
     pub(crate) fn on(date: Date, track_id: i32) -> Self {
@@ -80,7 +80,7 @@ impl ActiveModel {
             minute: Set(now.minute().try_into().ok()),
             second: Set(now.second().try_into().ok()),
             has_time_info: Set(Some(1)),
-            ..default()
+            ..Default::default()
         }
     }
 }
diff --git a/server/src/entities/tracks.rs b/server/src/entities/tracks.rs
index de4cef4..b3dfde0 100644
--- a/server/src/entities/tracks.rs
+++ b/server/src/entities/tracks.rs
@@ -24,6 +24,8 @@ pub enum Relation {
     Ticks,
     #[sea_orm(has_many = "super::track2_groups::Entity")]
     Track2Groups,
+    #[sea_orm(has_many = "super::user_tracks::Entity")]
+    UserTracks,
 }
 
 impl Related<super::ticks::Entity> for Entity {
@@ -38,4 +40,19 @@ impl Related<super::track2_groups::Entity> for Entity {
     }
 }
 
+impl Related<super::user_tracks::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::UserTracks.def()
+    }
+}
+
+impl Related<super::users::Entity> for Entity {
+    fn to() -> RelationDef {
+        super::user_tracks::Relation::Users.def()
+    }
+    fn via() -> Option<RelationDef> {
+        Some(super::user_tracks::Relation::Tracks.def().rev())
+    }
+}
+
 impl ActiveModelBehavior for ActiveModel {}
diff --git a/server/src/entities/user_tracks.rs b/server/src/entities/user_tracks.rs
new file mode 100644
index 0000000..a244d53
--- /dev/null
+++ b/server/src/entities/user_tracks.rs
@@ -0,0 +1,46 @@
+//! `SeaORM` Entity. Generated by sea-orm-codegen 0.11.3
+
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Eq)]
+#[sea_orm(table_name = "user_tracks")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: i32,
+    pub user_id: i32,
+    pub track_id: i32,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::tracks::Entity",
+        from = "Column::TrackId",
+        to = "super::tracks::Column::Id",
+        on_update = "NoAction",
+        on_delete = "NoAction"
+    )]
+    Tracks,
+    #[sea_orm(
+        belongs_to = "super::users::Entity",
+        from = "Column::UserId",
+        to = "super::users::Column::Id",
+        on_update = "NoAction",
+        on_delete = "NoAction"
+    )]
+    Users,
+}
+
+impl Related<super::tracks::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Tracks.def()
+    }
+}
+
+impl Related<super::users::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Users.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}
diff --git a/server/src/entities/users.rs b/server/src/entities/users.rs
new file mode 100644
index 0000000..57e0d6a
--- /dev/null
+++ b/server/src/entities/users.rs
@@ -0,0 +1,99 @@
+//! `SeaORM` Entity. Generated by sea-orm-codegen 0.11.3
+
+use std::default::Default;
+
+use bcrypt::*;
+// TODO Add option for argon2 https://docs.rs/argon2/latest/argon2/
+use either::Either::{self, Left, Right};
+use rocket::http::Status;
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+use crate::{
+    api::ErrorResponder,
+    error::{self, Error},
+};
+
+use super::tracks;
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Eq, Serialize, Deserialize)]
+#[sea_orm(table_name = "users")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    #[serde(skip_deserializing)]
+    pub id: i32,
+    pub name: String,
+    pub password_hash: String,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(has_many = "super::user_tracks::Entity")]
+    UserTracks,
+}
+impl Related<super::user_tracks::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::UserTracks.def()
+    }
+}
+
+impl Related<super::tracks::Entity> for Entity {
+    fn to() -> RelationDef {
+        super::user_tracks::Relation::Tracks.def()
+    }
+
+    fn via() -> Option<RelationDef> {
+        Some(super::user_tracks::Relation::Users.def().rev())
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}
+
+impl ActiveModel {
+    pub fn new(name: impl AsRef<str>, password: impl AsRef<str>) -> error::Result<Self> {
+        use sea_orm::ActiveValue::Set;
+        let name = Set(name.as_ref().to_string());
+        let password_hash = Set(hash(password.as_ref(), DEFAULT_COST)?);
+        Ok(Self {
+            name,
+            password_hash,
+            ..Default::default()
+        })
+    }
+}
+
+impl Model {
+    pub fn check_password(
+        self,
+        password: impl AsRef<[u8]>,
+    ) -> std::result::Result<Self, Either<Status, ErrorResponder>> {
+        match verify(password, &self.password_hash) {
+            Ok(true) => Ok(self),
+            Ok(false) => Err(Left(Status::Unauthorized)),
+            Err(err) => Err(Right(Error::from(err).into())),
+        }
+    }
+
+    pub async fn authorized_track(
+        &self,
+        track_id: i32,
+        db: &DatabaseConnection,
+    ) -> Option<tracks::Model> {
+        self.find_related(super::prelude::Tracks)
+            .filter(tracks::Column::Id.eq(track_id))
+            .one(db)
+            .await
+            .ok()
+            .flatten()
+    }
+    pub async fn is_authorized_for(&self, track_id: i32, db: &DatabaseConnection) -> bool {
+        self.authorized_track(track_id, db).await.is_some()
+    }
+
+    pub async fn authorized_tracks(&self, db: &DatabaseConnection) -> Vec<tracks::Model> {
+        self.find_related(super::prelude::Tracks)
+            .all(db)
+            .await
+            .unwrap_or_default()
+    }
+}
diff --git a/server/src/error.rs b/server/src/error.rs
index fbf5c10..a908650 100644
--- a/server/src/error.rs
+++ b/server/src/error.rs
@@ -1,5 +1,6 @@
 use std::string;
 
+use bcrypt::BcryptError;
 use derive_builder::UninitializedFieldError;
 
 #[derive(Debug, thiserror::Error)]
@@ -18,6 +19,10 @@ pub enum Error {
     Utf8(#[from] string::FromUtf8Error),
     #[error(transparent)]
     ChannelSendError(#[from] tokio::sync::broadcast::error::SendError<crate::api::update::Update>),
+    #[error(transparent)]
+    Bcrypt(#[from] BcryptError),
+    #[error(transparent)]
+    SerdeJson(#[from] serde_json::Error),
 }
 
 pub type Result<T> = std::result::Result<T, Error>;
diff --git a/server/src/lib.rs b/server/src/lib.rs
new file mode 100644
index 0000000..f18ba5a
--- /dev/null
+++ b/server/src/lib.rs
@@ -0,0 +1,8 @@
+#![feature(proc_macro_hygiene, decl_macro, never_type)]
+#[macro_use]
+extern crate rocket;
+pub mod api;
+pub mod db;
+pub mod entities;
+pub mod error;
+mod migrator;
diff --git a/server/src/main.rs b/server/src/main.rs
index 8959895..eaf236f 100644
--- a/server/src/main.rs
+++ b/server/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(default_free_fn, proc_macro_hygiene, decl_macro)]
+#![feature(proc_macro_hygiene, decl_macro, never_type)]
 #[macro_use]
 extern crate rocket;
 mod api;
@@ -6,32 +6,9 @@ mod db;
 mod entities;
 mod error;
 mod migrator;
-use crate::migrator::Migrator;
-use sea_orm::Database;
-use sea_orm_migration::prelude::*;
 
 #[launch]
 async fn rocket_defines_the_main_fn() -> _ {
-    femme::with_level(femme::LevelFilter::Debug);
-    let url = db::connection_url();
-    let db = Database::connect(url).await.expect("db connection");
-    let schema_manager = SchemaManager::new(&db);
-    Migrator::refresh(&db).await.expect("migration");
-    assert!(schema_manager
-        .has_table("tracks")
-        .await
-        .expect("fetch tracks table"));
-    assert!(schema_manager
-        .has_table("ticks")
-        .await
-        .expect("fetch ticks table"));
-    assert!(schema_manager
-        .has_table("groups")
-        .await
-        .expect("fetch groups table"));
-    assert!(schema_manager
-        .has_table("track2_groups")
-        .await
-        .expect("fetch track2groups table"));
-    api::start_server(db)
+    femme::with_level(femme::LevelFilter::Trace);
+    api::start_server(db::migrated().await)
 }
diff --git a/server/src/migrator/m20230626_083036_create_users_table.rs b/server/src/migrator/m20230626_083036_create_users_table.rs
new file mode 100644
index 0000000..7e77a64
--- /dev/null
+++ b/server/src/migrator/m20230626_083036_create_users_table.rs
@@ -0,0 +1,42 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(Users::Table)
+                    .if_not_exists()
+                    .col(
+                        ColumnDef::new(Users::Id)
+                            .integer()
+                            .not_null()
+                            .auto_increment()
+                            .primary_key(),
+                    )
+                    .col(ColumnDef::new(Users::Name).string().unique_key().not_null())
+                    .col(ColumnDef::new(Users::PasswordHash).string().not_null())
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(Users::Table).to_owned())
+            .await
+    }
+}
+
+/// Learn more at https://docs.rs/sea-query#iden
+#[derive(Iden)]
+pub(crate) enum Users {
+    Table,
+    Id,
+    Name,
+    PasswordHash,
+}
diff --git a/server/src/migrator/m20230626_150551_associate_users_and_tracks.rs b/server/src/migrator/m20230626_150551_associate_users_and_tracks.rs
new file mode 100644
index 0000000..b2bfcfd
--- /dev/null
+++ b/server/src/migrator/m20230626_150551_associate_users_and_tracks.rs
@@ -0,0 +1,57 @@
+use super::{
+    m20230606_000001_create_tracks_table::Tracks, m20230626_083036_create_users_table::Users,
+};
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(UserTracks::Table)
+                    .if_not_exists()
+                    .col(
+                        ColumnDef::new(UserTracks::Id)
+                            .integer()
+                            .not_null()
+                            .primary_key()
+                            .auto_increment(),
+                    )
+                    .col(ColumnDef::new(UserTracks::UserId).integer().not_null())
+                    .col(ColumnDef::new(UserTracks::TrackId).integer().not_null())
+                    .foreign_key(
+                        ForeignKey::create()
+                            .name("fk-user_tracks-user_id")
+                            .from(UserTracks::Table, UserTracks::UserId)
+                            .to(Users::Table, Users::Id),
+                    )
+                    .foreign_key(
+                        ForeignKey::create()
+                            .name("fk-user_tracks-track_id")
+                            .from(UserTracks::Table, UserTracks::TrackId)
+                            .to(Tracks::Table, Tracks::Id),
+                    )
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(UserTracks::Table).to_owned())
+            .await
+    }
+}
+
+/// Learn more at https://docs.rs/sea-query#iden
+#[derive(Iden)]
+enum UserTracks {
+    Table,
+    Id,
+    UserId,
+    TrackId,
+}
diff --git a/server/src/migrator/mod.rs b/server/src/migrator/mod.rs
index 473e061..edf6a1f 100644
--- a/server/src/migrator/mod.rs
+++ b/server/src/migrator/mod.rs
@@ -2,6 +2,8 @@ mod m20230606_000001_create_tracks_table;
 mod m20230606_000002_create_ticks_table;
 mod m20230606_000003_create_groups_table;
 mod m20230606_000004_create_track2groups_table;
+mod m20230626_083036_create_users_table;
+mod m20230626_150551_associate_users_and_tracks;
 
 use sea_orm_migration::prelude::*;
 
@@ -15,6 +17,8 @@ impl MigratorTrait for Migrator {
             Box::new(m20230606_000002_create_ticks_table::Migration),
             Box::new(m20230606_000003_create_groups_table::Migration),
             Box::new(m20230606_000004_create_track2groups_table::Migration),
+            Box::new(m20230626_083036_create_users_table::Migration),
+            Box::new(m20230626_150551_associate_users_and_tracks::Migration),
         ]
     }
 }
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..f7556e2
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,17 @@
+# DEVELOPMENT shell environment
+{ pkgs ? import <nixpkgs> {} }:
+
+pkgs.mkShell {
+  name = "kalkutago";
+  nativeBuildInputs = with pkgs.buildPackages; [
+    clang
+    yarn nodejs
+    openssl
+    python3
+    python3Packages.requests
+    python3Packages.ipython
+    rustup
+    docker
+    gnumake
+  ];
+}
diff --git a/test.py b/test.py
new file mode 100644
index 0000000..fe9db4f
--- /dev/null
+++ b/test.py
@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+#
+# Quick script to test endpoints of kalkutago
+
+from requests import get, post, put, patch
+from time import gmtime as utc
+
+credentials = {"name": "testuser", "password": "testpass"}
+track = {"name": "test", "description": "test track", "icon": "❓", "enabled": 1}
+
+def test_auth(method):
+    res = method(f'http://kalkutago/api/v1/auth', json=credentials)
+    assert 'user' in res.cookies.iterkeys(), \
+            f'no user cookie found. Cookies: {res.cookies.get_dict()}; body: ' + \
+            res.text
+    return res.cookies['user']
+
+def test_create_user():
+    return test_auth(post)
+
+def test_login():
+    return test_auth(put)
+
+def test_track_creation(auth_cookie):
+    res = post('http://kalkutago/api/v1/tracks', json=track,
+               cookies={'user': auth_cookie})
+    print(res.text)
+    res.raise_for_status()
+    return res.json()
+
+def test_get_track(auth_cookie, track):
+    res = get(f'http://kalkutago/api/v1/tracks/{track["id"]}',
+              cookies={'user': auth_cookie})
+    print(res.text)
+    res.raise_for_status()
+    retrieved = res.json()
+    assert track == retrieved, f'expected {track!r} to equal {retrieved!r}'
+    return retrieved
+
+def test_tick(auth_cookie, track):
+    res = patch(f'http://kalkutago/api/v1/tracks/{track["id"]}/ticked',
+              cookies={'user': auth_cookie})
+    print(res.text)
+    res.raise_for_status()
+    retrieved = res.json()
+    # result:
+    # {"id":1,"track_id":6,"year":2023,"month":8,"day":10,"hour":13,"minute":7,"second":41,"has_time_info":1}
+    now = utc()
+    assert retrieved['track_id'] == track['id']
+    assert retrieved['year'] == now.tm_year
+    assert retrieved['month'] == now.tm_mon
+    assert retrieved['day'] == now.tm_mday
+    return retrieved
+
+
+if __name__ == "__main__":
+    login_cookie = test_create_user()
+    test_login()
+    track = test_track_creation(login_cookie)
+    retrieved = test_get_track(login_cookie, track)
+    tick = test_tick(login_cookie, track)