diff --git a/docs/prompt.md b/docs/prompt.md
index 09ec7bc..8ec14d9 100644
--- a/docs/prompt.md
+++ b/docs/prompt.md
@@ -49,3 +49,7 @@ Folgende Dateien wurden in diesem Prompt verändert:
 Folgende Dateien wurden in diesem Prompt verändert:
     - frontend_splatournament_manager/pubspec.yaml
     - frontend_splatournament_manager/lib/providers/theme_provider.dart
+
+- Implement auth-aware router to keep users logged in after app restart.<br><br>
+Folgende Dateien wurden in diesem Prompt verändert:
+    - frontend_splatournament_manager/lib/main.dart
diff --git a/frontend_splatournament_manager/lib/main.dart b/frontend_splatournament_manager/lib/main.dart
index 5eeb7dd..2474631 100644
--- a/frontend_splatournament_manager/lib/main.dart
+++ b/frontend_splatournament_manager/lib/main.dart
@@ -45,8 +45,25 @@ class SplatournamentApp extends StatelessWidget {
   }
 }
 
-var routes = GoRouter(
+final routes = GoRouter(
   initialLocation: '/login',
+  redirect: (context, state) async {
+    final authProvider = Provider.of<AuthProvider>(context, listen: false);
+    await authProvider.checkAuthStatus();
+    
+    final isLoggedIn = authProvider.isLoggedIn;
+    final isGoingToLogin = state.matchedLocation == '/login';
+    // redirect to login 
+    if (!isLoggedIn && !isGoingToLogin) {
+      return '/login';
+    }
+    //already logged in
+    if (isLoggedIn && isGoingToLogin) {
+      return '/';
+    }
+    
+    return null;
+  },
   routes: [
     GoRoute(path: "/login", builder: (context, state) => const LoginPage()),
     GoRoute(