diff --git a/app.json b/app.json
index 0aa210f..1dc49c4 100644
--- a/app.json
+++ b/app.json
@@ -5,7 +5,7 @@
     "version": "1.0.0",
     "orientation": "portrait",
     "icon": "./assets/images/icon.png",
-    "scheme": "myapp",
+    "scheme": "led.matrix",
     "userInterfaceStyle": "automatic",
     "newArchEnabled": true,
     "ios": {
diff --git a/app/(tabs)/about.tsx b/app/(tabs)/about.tsx
index 105598f..294ef22 100644
--- a/app/(tabs)/about.tsx
+++ b/app/(tabs)/about.tsx
@@ -1,21 +1,37 @@
-import { Text, View, StyleSheet } from 'react-native';
+import {StyleSheet, Text, View} from 'react-native';
+import React, {useState} from "react";
+import SpotifyAuthButton from "@/components/SpotifyAuthButton";
+import {Token} from "@/services/RestService";
 
 export default function AboutScreen() {
-  return (
-      <View style={styles.container}>
-        <Text style={styles.text}>About screen</Text>
-      </View>
-  );
+    const [token, setToken] = useState<Token | null>(null);
+
+    const handleAuthSuccess = (token: Token) => {
+        setToken(token);
+        console.log('Erhaltener Authentifizierungscode:', token);
+        // Hier kannst du den Code weiterverwenden, um das Access Token zu erhalten
+    };
+
+    return (
+        <View style={styles.container}>
+            <Text style={styles.text}>About screen</Text>
+            <Text>Willkommen bei der Spotify Authentifizierung</Text>
+            <SpotifyAuthButton onAuthSuccess={handleAuthSuccess}/>
+            {token && <Text>Erhaltener Code: {token.access_token}</Text>}
+        </View>
+
+
+    );
 }
 
 const styles = StyleSheet.create({
-  container: {
-    flex: 1,
-    backgroundColor: '#25292e',
-    justifyContent: 'center',
-    alignItems: 'center',
-  },
-  text: {
-    color: '#fff',
-  },
+    container: {
+        flex: 1,
+        backgroundColor: '#25292e',
+        justifyContent: 'center',
+        alignItems: 'center',
+    },
+    text: {
+        color: '#fff',
+    },
 });
diff --git a/app/(tabs)/index.tsx b/app/(tabs)/index.tsx
index bf2965e..0a6bc44 100644
--- a/app/(tabs)/index.tsx
+++ b/app/(tabs)/index.tsx
@@ -1,62 +1,65 @@
 import {ActivityIndicator, StyleSheet, Text, View} from 'react-native';
 import Button from '@/components/Button';
 import ImageViewer from '@/components/ImageViewer';
-
-const PlaceholderImage = require('@/assets/images/GarfieldCharakter.webp');
-
 import * as ImagePicker from 'expo-image-picker';
 import {RestService} from '@/services/RestService';
 import useService from '@/hooks/useService';
 
+const PlaceholderImage = require('@/assets/images/GarfieldCharakter.webp');
+
+import * as WebBrowser from "expo-web-browser";
+
+WebBrowser.maybeCompleteAuthSession();
+
 export default function Index() {
-  const {data, loading, error} = useService(RestService.fetchAllUser);
+    const {data: usersData, loading: userLoading, error: userError} = useService(RestService.fetchAllUser);
 
-  const pickImageAsync = async () => {
-    let result = await ImagePicker.launchImageLibraryAsync({
-      mediaTypes: ['images'],
-      allowsEditing: true,
-      quality: 1,
-    });
+    const pickImageAsync = async () => {
+        let result = await ImagePicker.launchImageLibraryAsync({
+            mediaTypes: ['images'],
+            allowsEditing: true,
+            quality: 1,
+        });
 
-    if (!result.canceled) {
-      console.log(result);
-    } else {
-      alert('You did not select any image.');
-    }
-  };
+        if (!result.canceled) {
+            console.log(result);
+        } else {
+            alert('You did not select any image.');
+        }
+    };
 
-  console.log(data);
-  return (
-      <View style={styles.container}>
-        <View style={styles.imageContainer}>
-          <ImageViewer imgSource={PlaceholderImage}/>
+    console.log(usersData);
+    return (
+        <View style={styles.container}>
+            <View style={styles.imageContainer}>
+                <ImageViewer imgSource={PlaceholderImage}/>
+            </View>
+            <View style={styles.footerContainer}>
+                {userLoading && <ActivityIndicator/>}
+                {userError && <Text>Error: {userError.message}</Text>}
+                {usersData && (
+                    <Text>
+                        {usersData.users.map((item) => item.name).join('; ')}
+                    </Text>
+                )}
+                <Button label="Choose a photo" theme="primary" onPress={pickImageAsync}/>
+                <Button label="Use this photo"/>
+            </View>
         </View>
-        <View style={styles.footerContainer}>
-          {loading && <ActivityIndicator/>}
-          {error && <Text>Error: {error.message}</Text>}
-          {data && (
-              <Text>
-                {data.users.map((item) => item.name).join('; ')}
-              </Text>
-          )}
-          <Button label="Choose a photo" theme="primary" onPress={pickImageAsync}/>
-          <Button label="Use this photo"/>
-        </View>
-      </View>
-  );
+    );
 }
 
 const styles = StyleSheet.create({
-  container: {
-    flex: 1,
-    backgroundColor: '#25292e',
-    alignItems: 'center',
-  },
-  imageContainer: {
-    flex: 1,
-  },
-  footerContainer: {
-    flex: 1 / 3,
-    alignItems: 'center',
-  },
+    container: {
+        flex: 1,
+        backgroundColor: '#25292e',
+        alignItems: 'center',
+    },
+    imageContainer: {
+        flex: 1,
+    },
+    footerContainer: {
+        flex: 1 / 3,
+        alignItems: 'center',
+    },
 });
diff --git a/components/SpotifyAuthButton.tsx b/components/SpotifyAuthButton.tsx
new file mode 100644
index 0000000..21544f1
--- /dev/null
+++ b/components/SpotifyAuthButton.tsx
@@ -0,0 +1,26 @@
+import React from 'react';
+import {Button} from 'react-native';
+import {useSpotifyAuth} from '@/hooks/useSpotifyAuth';
+import {Token} from "@/services/RestService";
+
+interface SpotifyAuthButtonProps {
+    onAuthSuccess: (token: Token) => void;
+}
+
+const SpotifyAuthButton = ({onAuthSuccess}: SpotifyAuthButtonProps) => {
+    const {promptAuth, isReady, error} = useSpotifyAuth(onAuthSuccess);
+
+    if (error) {
+        console.error('Spotify Auth Error:', error);
+    }
+
+    return (
+        <Button
+            disabled={!isReady}
+            title={'Login mit Spotify'}
+            onPress={promptAuth}
+        />
+    );
+};
+
+export default SpotifyAuthButton;
diff --git a/hooks/useService.ts b/hooks/useService.ts
index d36afbb..fe79010 100644
--- a/hooks/useService.ts
+++ b/hooks/useService.ts
@@ -2,7 +2,6 @@ import {useState, useEffect} from 'react';
 
 type AsyncCallback<T> = () => Promise<T>;
 
-
 interface ServiceResult<T> {
   data: T | null,
   error: Error | null,
@@ -18,7 +17,7 @@ const useService = <T>(callback: AsyncCallback<T>): ServiceResult<T> => {
     const executeCallback = async () => {
       setLoading(true);
       try {
-        const result = await callback(); // Führe den übergebenen Callback aus
+        const result = await callback();
         setData(result);
       } catch (err) {
         setError(err as Error);
@@ -33,4 +32,4 @@ const useService = <T>(callback: AsyncCallback<T>): ServiceResult<T> => {
   return {data, loading, error};
 }
 
-export default useService;
\ No newline at end of file
+export default useService;
diff --git a/hooks/useSpotifyAuth.ts b/hooks/useSpotifyAuth.ts
new file mode 100644
index 0000000..7a8694e
--- /dev/null
+++ b/hooks/useSpotifyAuth.ts
@@ -0,0 +1,54 @@
+import {useEffect} from "react";
+import {makeRedirectUri, useAuthRequest} from "expo-auth-session";
+import {RestService, Token} from "@/services/RestService";
+
+const discovery = {
+    authorizationEndpoint: 'https://accounts.spotify.com/authorize',
+    tokenEndpoint: 'https://accounts.spotify.com/api/token',
+};
+
+interface UseSpotifyAuthResult {
+    promptAuth: () => void;
+    isReady: boolean;
+    error: Error | null;
+}
+
+export const useSpotifyAuth = (
+    onAuthSuccess: (token: Token) => void
+): UseSpotifyAuthResult => {
+    const [request, response, promptAsync] = useAuthRequest(
+        {
+            clientId: process.env.EXPO_PUBLIC_SPOTIFY_CLIENT_ID!,
+            scopes: ['user-read-currently-playing'],
+            usePKCE: false,
+            redirectUri: makeRedirectUri({
+                scheme: 'led.matrix',
+                path: 'callback',
+            }),
+        },
+        discovery
+    );
+
+    useEffect(() => {
+        const handleAuthResponse = async () => {
+            if (response?.type === 'success') {
+                try {
+                    const {code} = response.params;
+                    const token = (await RestService.exchangeSpotifyCodeForToken(code)).token;
+                    console.log('Token:', token);
+                    onAuthSuccess(token);
+                } catch (error) {
+                    console.error('Fehler bei der Authentifizierung:', error);
+                }
+            }
+        };
+
+        handleAuthResponse();
+    }, [response]);
+
+    return {
+        promptAuth: () => promptAsync(),
+        isReady: !!request,
+        error: response?.type === 'error' ? new Error('Auth fehlgeschlagen') : null,
+    };
+};
diff --git a/package-lock.json b/package-lock.json
index d88e20f..c63ce6a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,6 +14,7 @@
         "@react-navigation/native": "^7.0.0",
         "axios": "^1.7.7",
         "expo": "^52.0.10",
+        "expo-auth-session": "^6.0.0",
         "expo-blur": "~14.0.1",
         "expo-constants": "~17.0.3",
         "expo-dev-client": "~5.0.4",
@@ -7242,6 +7243,15 @@
         }
       }
     },
+    "node_modules/expo-application": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/expo-application/-/expo-application-6.0.1.tgz",
+      "integrity": "sha512-w+1quSmKp8SYKT+GAFHSN5c6u+PqoVRIfpsLyRQrQdOnBA9dA8Hw6JT9sHNFmA30A2v1b/sdYZE3qKuRJFNSWQ==",
+      "license": "MIT",
+      "peerDependencies": {
+        "expo": "*"
+      }
+    },
     "node_modules/expo-asset": {
       "version": "11.0.1",
       "resolved": "https://registry.npmjs.org/expo-asset/-/expo-asset-11.0.1.tgz",
@@ -7259,6 +7269,24 @@
         "react-native": "*"
       }
     },
+    "node_modules/expo-auth-session": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/expo-auth-session/-/expo-auth-session-6.0.0.tgz",
+      "integrity": "sha512-t40IvmUnWPdSFTr/d3FxDo3qbHdt6hPoRApZ9KH8/UoTjkdoSKnxi6W0/svpISDPMi25gB0lNYwy72YUisl1Yw==",
+      "license": "MIT",
+      "dependencies": {
+        "expo-application": "~6.0.0",
+        "expo-constants": "~17.0.0",
+        "expo-crypto": "~14.0.0",
+        "expo-linking": "~7.0.0",
+        "expo-web-browser": "~14.0.0",
+        "invariant": "^2.2.4"
+      },
+      "peerDependencies": {
+        "react": "*",
+        "react-native": "*"
+      }
+    },
     "node_modules/expo-blur": {
       "version": "14.0.1",
       "resolved": "https://registry.npmjs.org/expo-blur/-/expo-blur-14.0.1.tgz",
@@ -7284,6 +7312,18 @@
         "react-native": "*"
       }
     },
+    "node_modules/expo-crypto": {
+      "version": "14.0.1",
+      "resolved": "https://registry.npmjs.org/expo-crypto/-/expo-crypto-14.0.1.tgz",
+      "integrity": "sha512-/gGpD9UAz8fgZtU08cwwqeQElkFmMy2Hc8lLa9laSjD3YN0XM07zDJyJ+CC1VhQ63G8WpUnq1IHSmaPbbLp+oQ==",
+      "license": "MIT",
+      "dependencies": {
+        "base64-js": "^1.3.0"
+      },
+      "peerDependencies": {
+        "expo": "*"
+      }
+    },
     "node_modules/expo-dev-client": {
       "version": "5.0.4",
       "resolved": "https://registry.npmjs.org/expo-dev-client/-/expo-dev-client-5.0.4.tgz",
@@ -12634,6 +12674,25 @@
         }
       }
     },
+    "node_modules/react-native-app-auth": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/react-native-app-auth/-/react-native-app-auth-8.0.0.tgz",
+      "integrity": "sha512-uAlbR8ggVmFvH1zQwBWzksRTwpBMVIhAKsLhidwwlUH5idyTN4b4hJO7oDIa5FbvAAYcEZU5d0ChZDoIklomFw==",
+      "license": "MIT",
+      "dependencies": {
+        "invariant": "2.2.4",
+        "react-native-base64": "0.0.2"
+      },
+      "peerDependencies": {
+        "react-native": ">=0.63.0"
+      }
+    },
+    "node_modules/react-native-base64": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/react-native-base64/-/react-native-base64-0.0.2.tgz",
+      "integrity": "sha512-Fu/J1a2y0X22EJDWqJR2oEa1fpP4gTFjYxk8ElJdt1Yak3HOXmFJ7EohLVHU2DaQkgmKfw8qb7u/48gpzveRbg==",
+      "license": "MIT"
+    },
     "node_modules/react-native-gesture-handler": {
       "version": "2.20.2",
       "resolved": "https://registry.npmjs.org/react-native-gesture-handler/-/react-native-gesture-handler-2.20.2.tgz",
diff --git a/package.json b/package.json
index cda3687..c56b26c 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,7 @@
     "@react-navigation/native": "^7.0.0",
     "axios": "^1.7.7",
     "expo": "^52.0.10",
+    "expo-auth-session": "^6.0.0",
     "expo-blur": "~14.0.1",
     "expo-constants": "~17.0.3",
     "expo-dev-client": "~5.0.4",
diff --git a/services/RestService.ts b/services/RestService.ts
index 4a3589b..e29891e 100644
--- a/services/RestService.ts
+++ b/services/RestService.ts
@@ -1,72 +1,92 @@
 import axios from 'axios';
+import {makeRedirectUri} from "expo-auth-session";
 import User from "@/model/User";
 
 const API_URL = process.env.EXPO_PUBLIC_API_URL;
 const JWT_TOKEN = process.env.EXPO_PUBLIC_JWT_TOKEN;
 
+export interface Token {
+    access_token: string,
+    refresh_token: string,
+    expires_in: number,
+    token_type: string,
+    scope: string,
+
+}
+
+
 const RestService = {
-  fetchAllUser: async () => {
-    try {
-      const response = await axios.get<{ users: User[] }>(`${API_URL}/user`, {
-        headers: {
-          Authorization: `Bearer ${JWT_TOKEN}`,
-        },
-      });
-      return response.data;
-    } catch (error) {
-      throw error;
-    }
-  },
+    exchangeSpotifyCodeForToken: async (code: string) => {
+        try {
+            const redirectUri = makeRedirectUri({
+                scheme: 'led.matrix',
+                path: 'callback',
+            });
+            const response = await axios.get<{ token: Token }>(
+                `${API_URL}/spotify/token/generate/code/${code}/redirect-uri/${encodeURIComponent(redirectUri)}`, {
+                    headers: {
+                        Authorization: `Bearer ${JWT_TOKEN}`,
+                    }
+                }
+            );
+            return response.data;
+        } catch (error) {
+            console.error("Error exchanging Spotify code:", error);
+            throw error;
+        }
+    },
 
-  getCurrentlyPlayingSong: async (accessToken: string) => {
-    try {
-      const response = await axios.get('https://api.spotify.com/v1/me/player/currently-playing', {
-        headers: {
-          Authorization: `Bearer ${accessToken}`,
-        },
-      });
-      return response.data;
-    } catch (error) {
-      throw error;
-    }
-  },
+    fetchAllUser: async () => {
+        try {
+            const response = await axios.get<{ users: User[] }>(`${API_URL}/user`, {
+                headers: {
+                    Authorization: `Bearer ${JWT_TOKEN}`,
+                },
+            });
+            return response.data;
+        } catch (error) {
+            console.error("Error fetching users:", error);
+            throw error;
+        }
+    },
 
-  sendPayloadToSocket: async (userId: string, payload: Object) => {
-    try {
-      const response = await axios.post(
-          `${API_URL}/websocket/send-message`,
-          {users: [userId], payload},
-          {
-            headers: {
-              Authorization: `Bearer ${JWT_TOKEN}`,
-              'Content-Type': 'application/json',
-            },
-          }
-      );
-      return response.data;
-    } catch (error) {
-      throw error;
-    }
-  },
+    sendPayloadToSocket: async (userId: string, payload: object) => {
+        try {
+            const response = await axios.post(
+                `${API_URL}/websocket/send-message`,
+                {users: [userId], payload},
+                {
+                    headers: {
+                        Authorization: `Bearer ${JWT_TOKEN}`,
+                        'Content-Type': 'application/json',
+                    },
+                }
+            );
+            return response.data;
+        } catch (error) {
+            console.error("Error sending payload to socket:", error);
+            throw error;
+        }
+    },
 
-  broadcast: async (payload: Object) => {
-    try {
-      const response = await axios.post(
-          `${API_URL}/websocket/broadcast`,
-          {payload},
-          {
-            headers: {
-              Authorization: `Bearer ${JWT_TOKEN}`,
-              'Content-Type': 'application/json',
-            },
-          }
-      );
-      return response.data;
-    } catch (error) {
-      throw error;
-    }
-  },
+    broadcast: async (payload: object) => {
+        try {
+            const response = await axios.post(
+                `${API_URL}/websocket/broadcast`,
+                {payload},
+                {
+                    headers: {
+                        Authorization: `Bearer ${JWT_TOKEN}`,
+                        'Content-Type': 'application/json',
+                    },
+                }
+            );
+            return response.data;
+        } catch (error) {
+            console.error("Error broadcasting payload:", error);
+            throw error;
+        }
+    },
 };
 
-
 export {RestService};