auth_repository_impl.dart

@LazySingleton(as: AuthRepository)
class AuthRepositoryImpl implements AuthRepository {
  final FirebaseAuth _firebaseAuth;

  AuthRepositoryImpl(this._firebaseAuth);

  @override
  Future<Either<AuthFailure, Unit>> signInWithEmailAndPassword({
    required EmailAddress emailAddress,
    required Password password,
  }) async {
    final emailAddressString = emailAddress.getOrCrash();
    final passwordString = password.getOrCrash();
    try {
      await _firebaseAuth.signInWithEmailAndPassword(
        email: emailAddressString,
        password: passwordString,
      );
      return right(unit);
    } on FirebaseAuthException catch (exception) {
      if (exception.code == 'wrong-password' ||
          exception.code == 'user-not-found') {
        return left(const AuthFailure.invalidEmailAndPasswordCombination());
      } else {
        return left(const AuthFailure.serverError());
      }
    }
  }
}