change in network manager and login function

lib/data/services/auth_service.dart

@@ -2,7 +2,6 @@
 
 import 'dart:convert';
 
-import 'package:dio/dio.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:tm_app/data/services/model/login_response/login_response_model.dart';
 
@@ -19,31 +18,20 @@ class AuthService {
     required String username,
     required String password,
   }) async {
-    var headers = {
-      'accept': 'application/json',
-      'Content-Type': 'application/json',
-    };
-    var data = jsonEncode({"password": "Nima.1998", "username": "nakhostin"});
-    var dio = Dio(
-      BaseOptions(baseUrl: 'http://10.0.2.2:8081', headers: headers),
-    );
-    var response = await dio.request(
+    var data = jsonEncode({"password": password, "username": username});
+
+    final result = await _networkManager.makeRequest(
       '/admin/v1/profile/login',
-      options: Options(method: 'POST'),
+      method: 'POST',
+      (json) => LoginResponseModel.fromJson(json),
       data: data,
     );
 
-    if (response.statusCode == 200) {
+    if (result is Ok<LoginResponseModel>) {
       final prefs = await SharedPreferences.getInstance();
-      final token = response.data['data']?['access_token'];
-      prefs.setString('token', token);
-      if (token != null) {
-        await prefs.setString('bearer', token);
-      }
-      print(json.encode(response.data));
-    } else {
-      print(response.statusMessage);
+      final token = result.value.data.accessToken;
+      await prefs.setString('bearer', token);
     }
-    return Result.ok(LoginResponseModel.fromJson(response.data));
+    return result;
   }
 }