some changes

lib/view_models/auth_view_model.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+
 import '../core/utils/result.dart';
 import '../data/models/user_model.dart';
 import '../data/repositories/auth_repository.dart';
@@ -7,7 +8,7 @@ class AuthViewModel with ChangeNotifier {
   final AuthRepository _authRepository;
 
   AuthViewModel({required AuthRepository authRepository})
-      : _authRepository = authRepository {
+    : _authRepository = authRepository {
     usernameController.addListener(_onTextChanged);
     passwordController.addListener(_onTextChanged);
     usernameFocus.addListener(_onTextChanged);
@@ -22,8 +23,7 @@ class AuthViewModel with ChangeNotifier {
   bool _obscurePassword = true;
   bool get obscurePassword => _obscurePassword;
   bool get isLoginEnabled =>
-      usernameController.text.isNotEmpty &&
-      passwordController.text.isNotEmpty;
+      usernameController.text.isNotEmpty && passwordController.text.isNotEmpty;
 
   // Auth state
   bool _isLoading = false;
@@ -64,6 +64,8 @@ class AuthViewModel with ChangeNotifier {
 
     _isLoading = false;
     notifyListeners();
+    _errorMessage = null;
+    notifyListeners();
   }
 
   @override