我有一个带有文本字段的屏幕，当按下按钮时，它们被发送到一个cubit用于登录功能。我想做的是，当一个认证错误发生时，我想创建一个相关的小吃栏或对话框，但我有麻烦实现它。
文本字段：

CustomLoginTextField(
                      controller: emailController,
                      hint: 'ENTER YOUR EMAIL',
                      onChanged: (value) {
                        context.read<SigninCubit>().emailChanged(value);

                        //print(context.read<SigninCubit>().state.email);
                      },
                    ),
                    CustomLoginTextField(
                      controller: passwordController,
                      hint: 'ENTER YOUR PASSWORD',
                      onChanged: (value) {
                        context.read<SigninCubit>().passwordChanged(value);
                        //print(context.read<SigninCubit>().state.password);
                        // print(passwordController.text);
                      },
                    ),

相关按钮代码：

if (tabController.index == 3) {
            context.read<SigninCubit>().signInWithCredentials();
          }

腕尺状态：

part of 'signin_cubit.dart';

enum SigninStatus { initial, submitting, success, error }

class SigninState extends Equatable {
  final String email;
  final String password;
  final SigninStatus status;

  bool get isFormValid => email.isNotEmpty && password.isNotEmpty;

  const SigninState({
    required this.email,
    required this.password,
    required this.status,
  });

  factory SigninState.initial() {
    return SigninState(
      email: '',
      password: '',
      status: SigninStatus.initial,
    );
  }

  @override
  bool get stringify => true;

  @override
  List<Object> get props => [email, password, status];

  SigninState copyWith({
    String? email,
    String? password,
    SigninStatus? status,
  }) {
    return SigninState(
      email: email ?? this.email,
      password: password ?? this.password,
      status: status ?? this.status,
    );
  }
}

腕尺：

import 'package:bloc/bloc.dart';
import 'package:equatable/equatable.dart';
import 'package:hero/repository/auth_repository.dart';

part 'signin_state.dart';

class SigninCubit extends Cubit<SigninState> {
  final AuthRepository _authRepository;

  SigninCubit({required AuthRepository authRepository})
      : _authRepository = authRepository,
        super(SigninState.initial());

  void emailChanged(String value) {
    emit(state.copyWith(email: value, status: SigninStatus.initial));
  }

  void passwordChanged(String value) {
    emit(state.copyWith(password: value, status: SigninStatus.initial));
  }

  void signInWithCredentials() async {
    try {
      await _authRepository.signInWithEmailAndPassword(
          email: state.email, password: state.password);
      emit(
        state.copyWith(status: SigninStatus.success),
      );
    } catch (e) {
      emit(state.copyWith(status: SigninStatus.error));
    }
  }
}

相关auth函数：

Future<User?> signInWithEmailAndPassword(
      {required String email, required String password}) async {
    try {
      final credential = await _firebaseAuth.signInWithEmailAndPassword(
          email: email, password: password);
      final user = _userFromFirebaseUser(credential.user);
      return user;
    } catch (e) {
      print(e);
    }
  }

在auth函数中，我如何将该错误转化为与文本字段显示在同一屏幕上的snackbar/对话框？它目前正在打印错误，但这对用户体验没有太大帮助。谢谢你，谢谢！