record-tool/lib/features/auth/state/state_auth.dart

class AuthState {
  const AuthState({this.isLoading = false, this.errorMessage});

  final bool isLoading;
  final String? errorMessage;

  AuthState copyWith({bool? isLoading, String? errorMessage}) {
    return AuthState(
      isLoading: isLoading ?? this.isLoading,
      errorMessage: errorMessage,
    );
  }
}