# Go Router + Riverpod Tutorial Series 5: Advanced Redirection with State Restoration

First let's update our `AuthNotifier` to support state restoration

Source code: [redirection\_with\_state\_restoration](https://github.com/khkred/go_router_riverpod_tutorials/tree/advanced_redirection_with_state_restoration)

### Prerequisites:

First we are going to use `flutter_secure_storage` to store the state of the app.

So lets add it our `pubspec.yaml`

```bash
flutter pub add flutter_secure_storage
```

### AuthNotifier:

```dart
class AuthNotifier extends StateNotifier<Map<String, dynamic>> {
  final FlutterSecureStorage _storage = const FlutterSecureStorage();

  AuthNotifier() : super({'loggedIn': false, 'role': 'guest'}) {
    _restoreState();
  }

  Future<void> _restoreState() async {
    //First read the loggedIn state from the storage
    final loggedIn = await _storage.read(key: 'loggedIn') == 'true';

    //Next read the role from the storage
    final role = await _storage.read(key: 'role') ?? 'guest';
    state = {'loggedIn': loggedIn, 'role': role};
  }

  Future<void> login(String role) async{
    state = {'loggedIn': true, 'role': role};
    print('State change to true,  Logged in as $role');
    
    //Save the loggedIn state to the storage
    await _storage.write(key: 'loggedIn', value: 'true');
    await _storage.write(key: 'role', value: role);
  }

  Future<void> logout() async{
    state = {'loggedIn': false, 'role': 'guest'};
    print('State change to false, Logged out');
    
    //Save the loggedOut state to the storage
    await _storage.write(key: 'loggedIn', value: 'false');
    await _storage.write(key: 'role', value: 'guest');
  }
}
```

### Output:

Now that we have added the state restoration. So whenever the user is logged in. Even if we close and reopen the app. The authentication system will remain the same.

![State Restoration](https://media2.giphy.com/media/v1.Y2lkPTc5MGI3NjExMGg2eDF6YW05MW92M3B0YjdyZWt5NnJxeWQyNmMxcWNtZXQ2M3Y3YiZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/ei0ewVbyb0mu77yoV7/giphy.gif align="center")

As always you can find the source code for this tutorial here: [redirection\_with\_state\_restoration](https://github.com/khkred/go_router_riverpod_tutorials/tree/advanced_redirection_with_state_restoration)