completed velocity integration

lib/screens/onboarding/login/login_controller.dart

@@ -1,6 +1,7 @@
 import 'package:dio/dio.dart';
 import 'package:flutter/material.dart';
 import 'package:qpay/http/http.dart';
+import 'package:qpay/models/api_response.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 class LoginScreenModel {
@@ -20,19 +21,7 @@ class LoginController extends ChangeNotifier {
 
   LoginController(this.context);
 
-  void _showErrorSnackBar(String? message) {
-    WidgetsBinding.instance.addPostFrameCallback((_) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text(message.toString()),
-          behavior: SnackBarBehavior.floating,
-          backgroundColor: Colors.deepOrange,
-        ),
-      );
-    });
-  }
-
-  Future<LoginScreenModel> login(String username, String password) async {
+  Future<ApiResponse<LoginScreenModel>> login(String username, String password) async {
     try {
       model.isLoading = true;
       notifyListeners();
@@ -45,6 +34,9 @@ class LoginController extends ChangeNotifier {
       });
       logger.i(response.toString());
 
+      model.isLoading = false;
+      notifyListeners();
+
       if (response.containsKey('token')) {
         model.status = 'SUCCESS';
 
@@ -57,26 +49,25 @@ class LoginController extends ChangeNotifier {
         prefs.setString('userId', response['uuid']);
         prefs.setString('initials', response['firstName'].substring(0, 1) + response['lastName'].substring(0, 1));
 
-        return model;
+        return ApiResponse.success(model);
       } else {
         model.errorMessage =
             response['errorMessage'] ??
             "Problem with the transaction. Please try again or contact support";
-        _showErrorSnackBar(model.errorMessage);
+        return ApiResponse.failure(model.errorMessage!);
       }
     } on DioException catch (e, s) {
       logger.e(s);
-      _showErrorSnackBar(e.response?.data['errors'][0] ?? "Unknown error");
+      model.isLoading = false;
+      notifyListeners();
+      return ApiResponse.failure(e.response?.data['errors'][0] ?? "Unknown error");
     } catch (e, s) {
       logger.e(s);
-      _showErrorSnackBar(
+      model.isLoading = false;
+      notifyListeners();
+      return ApiResponse.failure(
         "Problem processing that transaction. Please try again or contact support",
       );
     }
-
-    model.isLoading = false;
-    notifyListeners();
-
-    return model;
   }
 }