How to implement authentication in flutter using riverpod - flutter

Question

I am trying to do a login using riverpod, the login must call an api but at the moment I am using a fake api I want that while the api is called I can show a loader to the user and if everything is correct navigate to home.
I have the following:
authentication_service.dart
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:watch_movie_app/src/data/data_source/local/fake_data.dart';
import 'package:watch_movie_app/src/data/models/models.dart';
import 'package:watch_movie_app/src/domain/models/models.dart';
class AuthenticationService {
Future<Auth> login(User user) async {
await Future.delayed(const Duration(seconds: 2));
User isName = fakeUsers.firstWhere(
(element) => element.name == user.name,
orElse: () => emptyUser(),
);
User isPassword = fakeUsers.firstWhere(
(element) => element.password == user.password,
orElse: () => emptyUser(),
);
if (isName.name != '' && isPassword.password != '') {
return Auth(
message: 'Succes welcome user',
status: true,
aditionalData: getRandomString(15));
}
return Auth(message: 'Credenciales incorrectas', status: false);
}
}
auth_provider.dart
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:watch_movie_app/src/data/enums/enum_login_status.dart';
import 'package:watch_movie_app/src/domain/constants/constants.dart';
import 'package:watch_movie_app/src/domain/providers/app_providers.dart';
final userAuthProvider = StateProvider<Map<String, dynamic>>((_) => {
'signedIn': false,
'loaded': false,
'status': LoginStatus.initialize,
});
final saveUserTokenProvider = StateProvider.family<bool, String>((ref, token) {
final localStore = ref.read(localStoreProvider);
localStore.write(tokenKey, token);
return true;
});
final userTokenProvider = StateProvider<String>((ref) {
final localStore = ref.read(localStoreProvider);
return localStore.read(tokenKey);
});
login_controller.dart
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:watch_movie_app/src/data/enums/enum_login_status.dart';
import 'package:watch_movie_app/src/data/models/models.dart';
import 'package:watch_movie_app/src/domain/models/models.dart';
import 'package:watch_movie_app/src/domain/providers/auth_provider.dart';
import 'package:watch_movie_app/src/domain/services/authentication_service.dart';
final authProvider = StateNotifierProvider((ref) => AuthNotifier(ref));
class AuthNotifier extends StateNotifier<Auth> {
final WidgetRef ref;
dynamic _authRepository;
AuthNotifier(this.ref) : super(Auth()) {
_authRepository = ref.read(authRepository);
}
Future<void> login(User user) async {
Map<String, dynamic> userAuthStatus = ref.read(userAuthProvider.state).state;
userAuthStatus = {...userAuthStatus, 'loaded': true};
final Auth loginResult = await _authRepository.login(user);
state = loginResult;
if (loginResult.status) {
userAuthStatus = {'loaded': false, 'signedIn': true, 'status': LoginStatus.success};
} else {
userAuthStatus = {...userAuthStatus, 'loaded': false, 'status': LoginStatus.failed};
}
}
void clearUser() {
state = Auth();
}
}
auth.dart
class Auth {
final String message, aditionalData;
bool status;
Auth({this.message = '', this.status = false, this.aditionalData = ''});
}
versions packages:
flutter_riverpod: ^2.0.0-dev.0
Flutter 2.10.2
Dart 2.15.1 DevTools 2.9.2