network manager and di added

lib/view_models/auth_view_model.dart

@@ -7,7 +7,8 @@ import '../data/repositories/auth_repository.dart';
 class AuthViewModel with ChangeNotifier {
   final AuthRepository _authRepository;
 
-  AuthViewModel(this._authRepository);
+  AuthViewModel({required AuthRepository authRepository})
+    : _authRepository = authRepository;
 
   bool _isLoading = false;
   String? _errorMessage;