diff --git a/lib/model/error/invalid_userid_error.dart b/lib/model/error/invalid_userid_error.dart
new file mode 100644
index 0000000..4e582b1
--- /dev/null
+++ b/lib/model/error/invalid_userid_error.dart
@@ -0,0 +1 @@
+class InvalidUserIdError extends Error {}
diff --git a/lib/model/error/invalid_username_error.dart b/lib/model/error/invalid_username_error.dart
new file mode 100644
index 0000000..12c4e01
--- /dev/null
+++ b/lib/model/error/invalid_username_error.dart
@@ -0,0 +1 @@
+class InvalidUserNameError extends Error {}
diff --git a/lib/model/error/not_loggedin_error.dart b/lib/model/error/not_loggedin_error.dart
new file mode 100644
index 0000000..490d829
--- /dev/null
+++ b/lib/model/error/not_loggedin_error.dart
@@ -0,0 +1 @@
+class NotLoggedInError extends Error {}
diff --git a/lib/navigation/main_navigator.dart b/lib/navigation/main_navigator.dart
index 0f2a1df..53d4186 100644
--- a/lib/navigation/main_navigator.dart
+++ b/lib/navigation/main_navigator.dart
@@ -22,6 +22,8 @@ class MainNavigator with BaseNavigator {
   List<NavigatorObserver> get navigatorObservers => _navigatorObservers;
 
   void showError(String title, {Object? error, StackTrace? trace}) {
+    final context = navigatorKey.currentContext;
+    if (context == null) return;
     Flushbar(
       title: title,
       message: error.toString(),
@@ -40,6 +42,8 @@ class MainNavigator with BaseNavigator {
   }
 
   void showMessage(String message) {
+    final context = navigatorKey.currentContext;
+    if (context == null) return;
     Flushbar(
       message: message.toString(),
       icon: const Icon(
diff --git a/lib/navigation/main_navigator.navigator.dart b/lib/navigation/main_navigator.navigator.dart
index 530a478..c1c8a0d 100644
--- a/lib/navigation/main_navigator.navigator.dart
+++ b/lib/navigation/main_navigator.navigator.dart
@@ -64,48 +64,39 @@ mixin BaseNavigator {
     return null;
   }
 
-  void goToLoginScreen({_i1.Key? key}) =>
-      navigatorKey.currentState?.pushNamedAndRemoveUntil<dynamic>(
+  void goToLoginScreen({_i1.Key? key}) => navigatorKey.currentState?.pushNamedAndRemoveUntil<dynamic>(
         RouteNames.loginScreen,
         (_) => false,
         arguments: {'key': key},
       );
-  Future<void> goToRaffleWinnerPickerScreen({_i1.Key? key}) async =>
-      navigatorKey.currentState?.pushNamed<dynamic>(
+  Future<void> goToRaffleWinnerPickerScreen({_i1.Key? key}) async => navigatorKey.currentState?.pushNamed<dynamic>(
         RouteNames.raffleWinnerPickerScreen,
         arguments: {'key': key},
       );
-  void goToQrScannerScreen({_i1.Key? key}) =>
-      navigatorKey.currentState?.pushNamedAndRemoveUntil<dynamic>(
+  void goToQrScannerScreen({_i1.Key? key}) => navigatorKey.currentState?.pushNamedAndRemoveUntil<dynamic>(
         RouteNames.qrScannerScreen,
         (_) => false,
         arguments: {'key': key},
       );
-  void goToRaffleScreen({_i1.Key? key}) =>
-      navigatorKey.currentState?.pushNamedAndRemoveUntil<dynamic>(
+  void goToRaffleScreen({_i1.Key? key}) => navigatorKey.currentState?.pushNamedAndRemoveUntil<dynamic>(
         RouteNames.raffleScreen,
         (_) => false,
         arguments: {'key': key},
       );
-  void goToSplashScreen({_i1.Key? key}) =>
-      navigatorKey.currentState?.pushNamedAndRemoveUntil<dynamic>(
+  void goToSplashScreen({_i1.Key? key}) => navigatorKey.currentState?.pushNamedAndRemoveUntil<dynamic>(
         RouteNames.splashScreen,
         (_) => false,
         arguments: {'key': key},
       );
   void goBack() => navigatorKey.currentState?.pop();
-  void goBackWithResult<T>({T? result}) =>
-      navigatorKey.currentState?.pop(result);
-  void popUntil(bool Function(Route<dynamic>) predicate) =>
-      navigatorKey.currentState?.popUntil(predicate);
-  void goBackTo(String routeName) =>
-      popUntil((route) => route.settings.name == routeName);
+  void goBackWithResult<T>({T? result}) => navigatorKey.currentState?.pop(result);
+  void popUntil(bool Function(Route<dynamic>) predicate) => navigatorKey.currentState?.popUntil(predicate);
+  void goBackTo(String routeName) => popUntil((route) => route.settings.name == routeName);
   Future<T?> showCustomDialog<T>({Widget? widget}) async => showDialog<T>(
         context: navigatorKey.currentContext!,
         builder: (_) => widget ?? const SizedBox.shrink(),
       );
-  Future<T?> showBottomSheet<T>({Widget? widget}) async =>
-      showModalBottomSheet<T>(
+  Future<T?> showBottomSheet<T>({Widget? widget}) async => showModalBottomSheet<T>(
         context: navigatorKey.currentContext!,
         builder: (_) => widget ?? const SizedBox.shrink(),
       );
diff --git a/lib/repo/login_repo.dart b/lib/repo/login_repo.dart
index bca606d..81ec235 100644
--- a/lib/repo/login_repo.dart
+++ b/lib/repo/login_repo.dart
@@ -57,7 +57,8 @@ class _LoginRepository implements LoginRepository {
         authProvider = GoogleAuthProvider();
         break;
     }
-    await _firebaseAuth.signInWithPopup(authProvider);
+    final userCredentials = await _firebaseAuth.signInWithPopup(authProvider);
+    _user = userCredentials.user;
   }
 
   @override
diff --git a/lib/viewmodel/login_viewmodel.dart b/lib/viewmodel/login_viewmodel.dart
index ed27a62..5a61ad4 100644
--- a/lib/viewmodel/login_viewmodel.dart
+++ b/lib/viewmodel/login_viewmodel.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/foundation.dart';
+import 'package:flutter/widgets.dart';
 import 'package:flutter_belgium/model/data/login/login_type.dart';
 import 'package:injectable/injectable.dart';
 import 'package:flutter_belgium/navigation/main_navigator.dart';
@@ -18,7 +18,14 @@ class LoginViewModel with ChangeNotifier {
     this._mainNavigator,
   );
 
-  void init() {}
+  void init() {
+    if (_loginRepository.isLoggedIn) {
+      WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
+        _mainNavigator.goToRaffleScreen();
+      });
+      return;
+    }
+  }
 
   Future<void> onLoginTapped(LoginType loginType) async {
     try {
diff --git a/lib/viewmodel/raffle_viewmodel.dart b/lib/viewmodel/raffle_viewmodel.dart
index 3cedb93..67b3cc2 100644
--- a/lib/viewmodel/raffle_viewmodel.dart
+++ b/lib/viewmodel/raffle_viewmodel.dart
@@ -1,7 +1,7 @@
 import 'dart:async';
 
 import 'package:confetti/confetti.dart';
-import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter_belgium/model/data/raffle/raffle.dart';
 import 'package:flutter_belgium/repo/raffle_repo.dart';
 import 'package:flutter_belgium/style/theme_duration.dart';
@@ -48,7 +48,15 @@ class RaffleViewModel with ChangeNotifier {
     this._mainNavigator,
   );
 
-  void init() => _getData();
+  void init() {
+    if (!_loginRepository.isLoggedIn) {
+      WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
+        _mainNavigator.goToLoginScreen();
+      });
+      return;
+    }
+    _getData();
+  }
 
   @override
   void dispose() {
@@ -101,12 +109,16 @@ class RaffleViewModel with ChangeNotifier {
   }
 
   Future<void> onEnterRaffleTapped() async {
-    final raffle = _raffle;
-    if (raffle == null) {
-      _mainNavigator.showError('No raffle found');
-      return;
+    try {
+      final raffle = _raffle;
+      if (raffle == null) {
+        _mainNavigator.showError('No raffle found');
+        return;
+      }
+      await _raffleRepository.enterRaffle(raffle.id);
+    } catch (e) {
+      _mainNavigator.showError('Failed to enter raffle', error: e);
     }
-    await _raffleRepository.enterRaffle(raffle.id);
   }
 
   void onStartFortuneWheel() => _mainNavigator.goToRaffleWinnerPickerScreen();
diff --git a/lib/widget/general/button.dart b/lib/widget/general/button.dart
index 37607cd..c1afd24 100644
--- a/lib/widget/general/button.dart
+++ b/lib/widget/general/button.dart
@@ -1,5 +1,7 @@
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_belgium/di/injectable.dart';
+import 'package:flutter_belgium/navigation/main_navigator.dart';
 import 'package:flutter_belgium/style/theme.dart';
 import 'package:flutter_belgium/widget/general/loading.dart';
 
@@ -86,7 +88,11 @@ class _ButtonState extends State<Button> {
   Future<void> _onTap() async {
     if (_isLoading) return;
     setState(() => _isLoading = true);
-    await widget.onTap();
+    try {
+      await widget.onTap();
+    } catch (e) {
+      getIt<MainNavigator>().showError('Failed to complete action', error: e);
+    }
     if (!mounted) return;
     setState(() => _isLoading = false);
   }