SignIn Page with BlocConsumer implemented

sign_in_with_bloc_consumer.dart

import 'package:bloc_auth/bloc/bloc/auth_bloc.dart';
import 'package:bloc_auth/data/repositories/auth_repository.dart';
import 'package:bloc_auth/presentation/Dashboard/dashboard.dart';
import 'package:bloc_auth/presentation/SignUp/sign_up.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';

class SignIn extends StatelessWidget {
  //....
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("SignIn"),
      ),
      body: BlocListener<AuthBloc, AuthState>(
        listener: (context, state) {
          if (state is Authenticated) {
            // Navigating to the dashboard screen if the user is authenticated
            Navigator.pushReplacement(context,
                MaterialPageRoute(builder: (context) => const Dashboard()));
          }
          if (state is AuthError) {
            // Showing the error message if the user has entered invalid credentials
            ScaffoldMessenger.of(context)
                .showSnackBar(SnackBar(content: Text(state.error)));
          }
        },
        child: BlocBuilder<AuthBloc, AuthState>(
          builder: (context, state) {
            if (state is Loading) {
              // Showing the loading indicator while the user is signing in
              return const Center(
                child: CircularProgressIndicator(),
              );
            }
            if (state is UnAuthenticated) {
              // Showing the sign in form if the user is not authenticated
              return Center(child: //...)
            }
            return Container();
          },
        ),
      ),
    );
  }
}