Remove LoginAPI, because it does not belongs to JMAP server

lib/features/login/data/datasource_impl/authentication_datasource_impl.dart

@@ -1,20 +1,14 @@
 import 'package:model/model.dart';
 import 'package:tmail_ui_user/features/login/data/datasource/authentication_datasource.dart';
-import 'package:tmail_ui_user/features/login/data/network/login_api.dart';
 
 class AuthenticationDataSourceImpl extends AuthenticationDataSource {
 
-  final LoginAPI loginAPI;
-
-  AuthenticationDataSourceImpl(this.loginAPI);
+  AuthenticationDataSourceImpl();
 
   @override
   Future<UserProfile> authenticationUser(Uri baseUrl, UserName userName, Password password) {
-    return Future.sync(() async {
-      final userProfileResponse = await loginAPI.authenticationUser(baseUrl, AccountRequest(userName, password));
-      return userProfileResponse.toUserProfile();
-    }).catchError((error) {
-      throw error;
+    return Future.sync(() {
+      return UserProfile(userName.userName);
     });
   }
 }