1. AuthController

              import 'package:get/get.dart';

class AuthController extends GetxController {
  var isAuthenticated = false.obs; // Observable for authentication status

  void login() {
    // Perform login logic
    // If successful, set isAuthenticated to true
    isAuthenticated.value = true;
  }

  void logout() {
    // Perform logout logic
    // Set isAuthenticated to false
    isAuthenticated.value = false;
  }
}

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      title: 'Auth Example',
      home: HomePage(),
    );
  }
}

3. Authentication Flow in Widgets:

import 'package:flutter/material.dart';
import 'package:get/get.dart';

class HomePage extends StatelessWidget {
  final AuthController _authController = Get.put(AuthController());

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Authentication Example'),
      ),
      body: Center(
        child: Obx(() {
          return _authController.isAuthenticated.value
              ? AuthenticatedScreen() // User is authenticated
              : UnauthenticatedScreen(); // User is not authenticated
        }),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          _authController.login(); // Simulate login action
        },
        child: Icon(Icons.login),
      ),
    );
  }
}

class AuthenticatedScreen extends StatelessWidget {
  final AuthController _authController = Get.find();

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Text('Welcome!'),
        ElevatedButton(
          onPressed: () {
            _authController.logout(); // Perform logout action
          },
          child: Text('Logout'),
        ),
      ],
    );
  }
}

class UnauthenticatedScreen extends StatelessWidget {
  final AuthController _authController = Get.find();

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Text('Please log in to continue.'),
        ElevatedButton(
          onPressed: () {
            _authController.login(); // Perform login action
          },
          child: Text('Login'),
        ),
      ],
    );
  }
}