added zwg support

lib/screens/onboarding/login/login_controller.dart

@@ -1,3 +1,5 @@
+import 'dart:convert';
+
 import 'package:dio/dio.dart';
 import 'package:flutter/material.dart';
 import 'package:qpay/auth_state.dart';
@@ -5,6 +7,8 @@ import 'package:qpay/http/http.dart';
 import 'package:qpay/models/api_response.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
+import '../../../models/user_model.dart';
+
 class LoginScreenModel {
   String username = "";
   String password = "";
@@ -72,6 +76,9 @@ class LoginController extends ChangeNotifier {
                   : ''),
         );
 
+        UserModel userModel = UserModel.fromJson(response);
+        prefs.setString("userModel", jsonEncode(userModel));
+
         // Notify the router that the user is now signed in so any
         // auth-gated redirects (e.g. the groups flow) are re-evaluated
         // and the user is sent to their originally requested page.