diff --git a/lib/app/bindings/initial_bindings.dart b/lib/app/bindings/initial_bindings.dart
index ea48a0b..d9631c9 100644
--- a/lib/app/bindings/initial_bindings.dart
+++ b/lib/app/bindings/initial_bindings.dart
@@ -1,9 +1,11 @@
 import 'package:get/get.dart';
 import 'package:quiz_app/data/providers/dio_client.dart';
+import 'package:quiz_app/data/services/user_storage_service.dart';
 
 class InitialBindings extends Bindings {
   @override
   void dependencies() {
+    Get.put<UserStorageService>(UserStorageService());
     Get.putAsync(() => ApiClient().init());
   }
 }
diff --git a/lib/app/middleware/auth_middleware.dart b/lib/app/middleware/auth_middleware.dart
index b486f35..2dcea74 100644
--- a/lib/app/middleware/auth_middleware.dart
+++ b/lib/app/middleware/auth_middleware.dart
@@ -1,11 +1,15 @@
 import 'package:flutter/material.dart';
-import 'package:get/get_navigation/src/routes/route_middleware.dart';
+import 'package:get/get.dart';
 import 'package:quiz_app/app/routes/app_pages.dart';
+import 'package:quiz_app/data/services/user_storage_service.dart';
 
 class AuthMiddleware extends GetMiddleware {
   @override
   RouteSettings? redirect(String? route) {
-    if (route != null) return RouteSettings(name: AppRoutes.loginPage);
+    final UserStorageService _storageService = Get.find();
+    if (!_storageService.isLogged) {
+      return const RouteSettings(name: AppRoutes.loginPage);
+    }
     return null;
   }
 }
diff --git a/lib/data/models/base/base_model.dart b/lib/data/models/base/base_model.dart
new file mode 100644
index 0000000..9e1e6ea
--- /dev/null
+++ b/lib/data/models/base/base_model.dart
@@ -0,0 +1,22 @@
+class BaseResponseModel<T> {
+  final String message;
+  final T? data;
+  final dynamic meta;
+
+  BaseResponseModel({
+    required this.message,
+    this.data,
+    this.meta,
+  });
+
+  factory BaseResponseModel.fromJson(
+    Map<String, dynamic> json,
+    T Function(Map<String, dynamic>) fromJsonT,
+  ) {
+    return BaseResponseModel<T>(
+      message: json['message'],
+      data: json['data'] != null ? fromJsonT(json['data']) : null,
+      meta: json['meta'],
+    );
+  }
+}
diff --git a/lib/data/models/login/login_request_model.dart b/lib/data/models/login/login_request_model.dart
new file mode 100644
index 0000000..c54a862
--- /dev/null
+++ b/lib/data/models/login/login_request_model.dart
@@ -0,0 +1,23 @@
+class LoginRequestModel {
+  final String email;
+  final String password;
+
+  LoginRequestModel({
+    required this.email,
+    required this.password,
+  });
+
+  factory LoginRequestModel.fromJson(Map<String, dynamic> json) {
+    return LoginRequestModel(
+      email: json['email'] ?? '',
+      password: json['password'] ?? '',
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'email': email,
+      'password': password,
+    };
+  }
+}
diff --git a/lib/data/models/login/login_response_model.dart b/lib/data/models/login/login_response_model.dart
new file mode 100644
index 0000000..0e2a110
--- /dev/null
+++ b/lib/data/models/login/login_response_model.dart
@@ -0,0 +1,55 @@
+class LoginResponseModel {
+  final String? id;
+  final String? googleId;
+  final String email;
+  final String name;
+  final DateTime? birthDate;
+  final String? picUrl;
+  final String? phone;
+  final String locale;
+  // final DateTime? createdAt;
+  // final DateTime? updatedAt;
+
+  LoginResponseModel({
+    this.id,
+    this.googleId,
+    required this.email,
+    required this.name,
+    this.birthDate,
+    this.picUrl,
+    this.phone,
+    this.locale = "en-US",
+    // this.createdAt,
+    // this.updatedAt,
+  });
+
+  factory LoginResponseModel.fromJson(Map<String, dynamic> json) {
+    return LoginResponseModel(
+      id: json['_id'],
+      googleId: json['google_id'],
+      email: json['email'],
+      name: json['name'],
+      birthDate: json['birth_date'] != null ? DateTime.parse(json['birth_date']) : null,
+      picUrl: json['pic_url'],
+      phone: json['phone'],
+      locale: json['locale'] ?? 'en-US',
+      // createdAt: json['created_at'] != null ? DateTime.parse(json['created_at']) : null,
+      // updatedAt: json['updated_at'] != null ? DateTime.parse(json['updated_at']) : null,
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      '_id': id,
+      'google_id': googleId,
+      'email': email,
+      'name': name,
+      'birth_date': birthDate?.toIso8601String(),
+      'pic_url': picUrl,
+      'phone': phone,
+      'locale': locale,
+      // 'created_at': createdAt?.toIso8601String(),
+      // 'updated_at': updatedAt?.toIso8601String(),
+    };
+  }
+}
diff --git a/lib/data/services/auth_service.dart b/lib/data/services/auth_service.dart
index 98163d6..260c8f0 100644
--- a/lib/data/services/auth_service.dart
+++ b/lib/data/services/auth_service.dart
@@ -1,6 +1,9 @@
 import 'package:dio/dio.dart';
 import 'package:get/get.dart';
 import 'package:quiz_app/core/endpoint/api_endpoint.dart';
+import 'package:quiz_app/data/models/base/base_model.dart';
+import 'package:quiz_app/data/models/login/login_request_model.dart';
+import 'package:quiz_app/data/models/login/login_response_model.dart';
 import 'package:quiz_app/data/models/register/register_request.dart';
 import 'package:quiz_app/data/providers/dio_client.dart';
 
@@ -13,11 +16,47 @@ class AuthService extends GetxService {
     super.onInit();
   }
 
-  Future<void> register(RegisterRequestModel request) async {
+  Future<bool> register(RegisterRequestModel request) async {
     var data = await _dio.post(
       APIEndpoint.register,
       data: request.toJson(),
     );
-    print(data);
+    if (data.statusCode == 200) {
+      return true;
+    } else {
+      throw Exception("Registration failed");
+    }
+  }
+
+  Future<LoginResponseModel> loginWithEmail(LoginRequestModel request) async {
+    final data = request.toJson();
+    final response = await _dio.post(APIEndpoint.login, data: data);
+
+    if (response.statusCode == 200) {
+      final baseResponse = BaseResponseModel<LoginResponseModel>.fromJson(
+        response.data,
+        (json) => LoginResponseModel.fromJson(json),
+      );
+      return baseResponse.data!;
+    } else {
+      throw Exception("Login failed");
+    }
+  }
+
+  Future<LoginResponseModel> loginWithGoogle(String idToken) async {
+    final response = await _dio.post(
+      APIEndpoint.loginGoogle,
+      data: {"token_id": idToken},
+    );
+
+    if (response.statusCode == 200) {
+      final baseResponse = BaseResponseModel<LoginResponseModel>.fromJson(
+        response.data,
+        (json) => LoginResponseModel.fromJson(json),
+      );
+      return baseResponse.data!;
+    } else {
+      throw Exception("Google login failed");
+    }
   }
 }
diff --git a/lib/data/services/user_storage_service.dart b/lib/data/services/user_storage_service.dart
new file mode 100644
index 0000000..71e599e
--- /dev/null
+++ b/lib/data/services/user_storage_service.dart
@@ -0,0 +1,31 @@
+import 'dart:convert';
+import 'package:quiz_app/data/models/login/login_response_model.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class UserStorageService {
+  static const _userKey = 'user_data';
+  bool isLogged = false;
+
+  Future<void> saveUser(LoginResponseModel user) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString(_userKey, jsonEncode(user.toJson()));
+  }
+
+  Future<LoginResponseModel?> loadUser() async {
+    final prefs = await SharedPreferences.getInstance();
+    final jsonString = prefs.getString(_userKey);
+
+    if (jsonString == null) return null;
+    return LoginResponseModel.fromJson(jsonDecode(jsonString));
+  }
+
+  Future<void> clearUser() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove(_userKey);
+  }
+
+  Future<bool> isLoggedIn() async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.containsKey(_userKey);
+  }
+}
diff --git a/lib/feature/login/bindings/login_binding.dart b/lib/feature/login/bindings/login_binding.dart
index 8ca14ce..dce6efd 100644
--- a/lib/feature/login/bindings/login_binding.dart
+++ b/lib/feature/login/bindings/login_binding.dart
@@ -1,10 +1,13 @@
 import 'package:get/get_core/get_core.dart';
 import 'package:get/get_instance/get_instance.dart';
+import 'package:quiz_app/data/services/auth_service.dart';
+import 'package:quiz_app/data/services/user_storage_service.dart';
 import 'package:quiz_app/feature/login/controllers/login_controller.dart';
 
 class LoginBinding extends Bindings {
   @override
   void dependencies() {
-    Get.lazyPut(() => LoginController());
+    Get.lazyPut(() => AuthService());
+    Get.lazyPut(() => LoginController(Get.find<AuthService>(), Get.find<UserStorageService>()));
   }
 }
diff --git a/lib/feature/login/controllers/login_controller.dart b/lib/feature/login/controllers/login_controller.dart
index b22e887..dfc4297 100644
--- a/lib/feature/login/controllers/login_controller.dart
+++ b/lib/feature/login/controllers/login_controller.dart
@@ -1,21 +1,26 @@
-import 'dart:convert';
 import 'package:get/get.dart';
-import 'package:http/http.dart' as http;
 import 'package:google_sign_in/google_sign_in.dart';
 import 'package:flutter/material.dart';
 import 'package:quiz_app/app/routes/app_pages.dart';
-import 'package:quiz_app/core/endpoint/api_endpoint.dart';
 import 'package:quiz_app/core/utils/logger.dart';
+import 'package:quiz_app/data/models/login/login_request_model.dart';
+import 'package:quiz_app/data/models/login/login_response_model.dart';
+import 'package:quiz_app/data/services/auth_service.dart';
+import 'package:quiz_app/data/services/user_storage_service.dart';
 
 class LoginController extends GetxController {
+  final AuthService _authService;
+  final UserStorageService _userStorageService;
+
+  LoginController(this._authService, this._userStorageService);
   final TextEditingController emailController = TextEditingController();
   final TextEditingController passwordController = TextEditingController();
 
   var isPasswordHidden = true.obs;
-  var isLoading = false.obs; // Loading state for UI
+  var isLoading = false.obs;
   final GoogleSignIn _googleSignIn = GoogleSignIn(
     scopes: ['email', 'profile', 'openid'],
-  ); // Singleton instance
+  );
 
   void togglePasswordVisibility() {
     isPasswordHidden.value = !isPasswordHidden.value;
@@ -34,19 +39,18 @@ class LoginController extends GetxController {
     try {
       isLoading.value = true;
 
-      var response = await http.post(
-        Uri.parse("${APIEndpoint.baseUrl}${APIEndpoint.login}"),
-        body: jsonEncode({"email": email, "password": password}),
-        headers: {"Content-Type": "application/json"},
+      LoginResponseModel response = await _authService.loginWithEmail(
+        LoginRequestModel(
+          email: email,
+          password: password,
+        ),
       );
 
-      if (response.statusCode == 200) {
-        var data = jsonDecode(response.body);
-      } else {
-        var errorMsg = jsonDecode(response.body)['message'] ?? "Invalid credentials";
-        logC.i(errorMsg);
-        Get.snackbar("Error", errorMsg);
-      }
+      await _userStorageService.saveUser(response);
+
+      _userStorageService.isLogged = true;
+
+      Get.toNamed(AppRoutes.homePage);
     } catch (e, stackTrace) {
       logC.e(e, stackTrace: stackTrace);
       Get.snackbar("Error", "Failed to connect to server");
@@ -63,10 +67,6 @@ class LoginController extends GetxController {
         return;
       }
 
-      logC.i("Google User ID: ${googleUser.id}");
-      logC.i("Google User Email: ${googleUser.email}");
-      logC.i("Google User Display Name: ${googleUser.displayName}");
-
       final GoogleSignInAuthentication googleAuth = await googleUser.authentication;
 
       if (googleAuth.idToken == null || googleAuth.idToken!.isEmpty) {
@@ -75,25 +75,13 @@ class LoginController extends GetxController {
       }
 
       String idToken = googleAuth.idToken!;
-      logC.i("Google ID Token: $idToken");
 
-      // Send ID Token to backend
-      var response = await http.post(
-        Uri.parse("${APIEndpoint.baseUrl}${APIEndpoint.loginGoogle}"),
-        body: jsonEncode({"token_id": idToken}),
-        headers: {"Content-Type": "application/json"},
-      );
+      final response = await _authService.loginWithGoogle(idToken);
+      await _userStorageService.saveUser(response);
 
-      if (response.statusCode == 200) {
-        var data = jsonDecode(response.body);
+      _userStorageService.isLogged = true;
 
-        Get.snackbar("Success", "Google login successful!");
-        // logC.i("Backend Auth Token: $backendToken");
-      } else {
-        var errorMsg = jsonDecode(response.body)['message'] ?? "Google login failed";
-        Get.snackbar("Error", errorMsg);
-        logC.i(errorMsg);
-      }
+      Get.toNamed(AppRoutes.homePage);
     } catch (e, stackTrace) {
       logC.e("Google Sign-In Error: $e", stackTrace: stackTrace);
       Get.snackbar("Error", "Google sign-in error");
diff --git a/lib/feature/splash_screen/presentation/splash_screen_page.dart b/lib/feature/splash_screen/presentation/splash_screen_page.dart
index 5819aef..c5c2dc5 100644
--- a/lib/feature/splash_screen/presentation/splash_screen_page.dart
+++ b/lib/feature/splash_screen/presentation/splash_screen_page.dart
@@ -2,21 +2,36 @@ import 'package:flutter/material.dart';
 import 'package:get/get.dart';
 import 'package:quiz_app/app/routes/app_pages.dart';
 import 'package:quiz_app/component/app_name.dart';
+import 'package:quiz_app/data/services/user_storage_service.dart';
 
 class SplashScreenView extends StatelessWidget {
   const SplashScreenView({super.key});
 
+  void _navigate() async {
+    final storageService = Get.find<UserStorageService>();
+    final isLoggedIn = await storageService.isLoggedIn();
+    storageService.isLogged = isLoggedIn;
+
+    await Future.delayed(const Duration(seconds: 2));
+
+    if (isLoggedIn) {
+      Get.offNamed(AppRoutes.homePage);
+    } else {
+      Get.offNamed(AppRoutes.loginPage);
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
-    // Delay navigation after the first frame is rendered
+    // Jalankan navigasi setelah frame pertama selesai dirender
     WidgetsBinding.instance.addPostFrameCallback((_) {
-      Future.delayed(const Duration(seconds: 2), () {
-        Get.offNamed(AppRoutes.homePage);
-      });
+      _navigate();
     });
 
-    return Scaffold(
-      body: Center(child: AppName()),
+    return const Scaffold(
+      body: Center(
+        child: AppName(),
+      ),
     );
   }
 }
diff --git a/pubspec.lock b/pubspec.lock
index b76549f..299040d 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -73,6 +73,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.1"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: "16ed7b077ef01ad6170a3d0c57caa4a112a38d7a2ed5602e0aca9ca6f3d98da6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -161,7 +177,7 @@ packages:
     source: hosted
     version: "0.12.4+3"
   http:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: http
       sha256: fe7ab022b76f3034adc518fb6ea04a82387620e19977665ea18d30a1cf43442f
@@ -248,6 +264,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.0"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      sha256: f7a1fe3a634fe7734c8d3f2766ad746ae2a2884abe22e241a8b301bf5cac3279
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.1"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      sha256: "88f5779f72ba699763fa3a3b06aa4bf6de76c8e5de842cf6f29e2e06476c2334"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      sha256: bd6f00dbd873bfb70d0761682da2b3a2c2fccc2b9e84c495821639601d81afe7
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.0"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      sha256: "5d6b1b0036a5f331ebc77c850ebc8506cbc1e9416c27e59b439f917a902a4984"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.6"
   plugin_platform_interface:
     dependency: transitive
     description:
@@ -256,6 +304,62 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.8"
+  shared_preferences:
+    dependency: "direct main"
+    description:
+      name: shared_preferences
+      sha256: "6e8bf70b7fef813df4e9a36f658ac46d107db4b4cfe1048b477d4e453a8159f5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.3"
+  shared_preferences_android:
+    dependency: transitive
+    description:
+      name: shared_preferences_android
+      sha256: "20cbd561f743a342c76c151d6ddb93a9ce6005751e7aa458baad3858bfbfb6ac"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.10"
+  shared_preferences_foundation:
+    dependency: transitive
+    description:
+      name: shared_preferences_foundation
+      sha256: "6a52cfcdaeac77cad8c97b539ff688ccfc458c007b4db12be584fbe5c0e49e03"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.4"
+  shared_preferences_linux:
+    dependency: transitive
+    description:
+      name: shared_preferences_linux
+      sha256: "580abfd40f415611503cae30adf626e6656dfb2f0cee8f465ece7b6defb40f2f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      sha256: "57cbf196c486bc2cf1f02b85784932c6094376284b3ad5779d1b1c6c6a816b80"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      sha256: c49bd060261c9a3f0ff445892695d6212ff603ef3115edbb448509d407600019
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.3"
+  shared_preferences_windows:
+    dependency: transitive
+    description:
+      name: shared_preferences_windows
+      sha256: "94ef0f72b2d71bc3e700e025db3710911bd51a71cefb65cc609dd0d9a982e3c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -341,6 +445,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.1"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      sha256: "7a3f37b05d989967cdddcbb571f1ea834867ae2faa29725fd085180e0883aa15"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
 sdks:
   dart: ">=3.6.0 <4.0.0"
-  flutter: ">=3.24.0"
+  flutter: ">=3.27.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 0b93ba6..c731b77 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -39,6 +39,7 @@ dependencies:
   google_sign_in: ^6.2.2
   flutter_dotenv: ^5.2.1
   dio: ^5.8.0+1
+  shared_preferences: ^2.5.3
 
 dev_dependencies:
   flutter_test: