diff --git a/covas_mobile/lib/classes/auth_service.dart b/covas_mobile/lib/classes/auth_service.dart
index 507c3e4..ba32f13 100644
--- a/covas_mobile/lib/classes/auth_service.dart
+++ b/covas_mobile/lib/classes/auth_service.dart
@@ -3,6 +3,8 @@ import 'package:shared_preferences/shared_preferences.dart';
 import 'package:http/http.dart' as http;
 import '../variable/globals.dart' as globals;
 import 'dart:io';
+import 'package:flutter/material.dart';
+import '../pages/LoginDemo.dart';
 
 class AuthService {
   // Login with username and password
@@ -86,6 +88,21 @@ class AuthService {
     }
   }
 
+  Future<void> checkTokenStatus(context) async {
+    bool loggedIn = await isLoggedIn();
+    SharedPreferences prefs = await SharedPreferences.getInstance();
+
+    if (!loggedIn) {
+      await prefs.remove("access_token"); // Correctly remove the token
+
+      Navigator.pushAndRemoveUntil(
+        context,
+        MaterialPageRoute(builder: (_) => LoginDemo()),
+        (route) => false, // Remove all previous routes
+      );
+    }
+  }
+
   // Get stored access token
   Future<String?> getAccessToken() async {
     final prefs = await SharedPreferences.getInstance();
diff --git a/covas_mobile/lib/pages/AddProfile.dart b/covas_mobile/lib/pages/AddProfile.dart
index ed154b1..5e7c8c0 100644
--- a/covas_mobile/lib/pages/AddProfile.dart
+++ b/covas_mobile/lib/pages/AddProfile.dart
@@ -140,6 +140,7 @@ class _AddProfileState extends State<AddProfile> with ShowAlertDialog {
   @override
   void initState() {
     super.initState();
+
     AdHelper.createBannerAd(() => setState(() {})).then((ad) {
       setState(() {
         _bannerAd = ad;
diff --git a/covas_mobile/lib/pages/Camera.dart b/covas_mobile/lib/pages/Camera.dart
index 17fd22f..6c79f94 100644
--- a/covas_mobile/lib/pages/Camera.dart
+++ b/covas_mobile/lib/pages/Camera.dart
@@ -1,5 +1,4 @@
 import 'dart:async';
-import 'dart:io';
 
 import 'package:image_picker/image_picker.dart';
 import '../classes/MyDrawer.dart';
@@ -7,6 +6,7 @@ import '../classes/MyDrawer.dart';
 import 'DisplayPictureScreen.dart';
 import 'package:camera/camera.dart';
 import 'package:flutter/material.dart';
+import '../classes/auth_service.dart';
 
 Future<void> main() async {
   // Ensure that plugin services are initialized so that `availableCameras()`
@@ -46,12 +46,14 @@ class Camera extends StatefulWidget {
 class CameraState extends State<Camera> {
   late CameraController _controller;
   late Future<void> _initializeControllerFuture;
+  final AuthService _authService = AuthService();
 
   @override
   void initState() {
     super.initState();
     // To display the current output from the Camera,
     // create a CameraController.
+    _authService.checkTokenStatus(context);
 
     _controller = CameraController(
       // Get a specific camera from the list of available cameras.
@@ -95,7 +97,6 @@ class CameraState extends State<Camera> {
         // camera preview. Use a FutureBuilder to display a loading spinner until the
         // controller has finished initializing.
         drawer: MyDrawer(),
-
         body: FutureBuilder<void>(
           future: _initializeControllerFuture,
           builder: (context, snapshot) {
diff --git a/covas_mobile/lib/pages/CameraEdit.dart b/covas_mobile/lib/pages/CameraEdit.dart
index ad91db5..09034ce 100644
--- a/covas_mobile/lib/pages/CameraEdit.dart
+++ b/covas_mobile/lib/pages/CameraEdit.dart
@@ -7,6 +7,7 @@ import 'package:image_picker/image_picker.dart';
 import 'EditEvent.dart';
 import 'package:camera/camera.dart';
 import 'package:flutter/material.dart';
+import '../classes/auth_service.dart';
 
 Future<void> main() async {
   // Ensure that plugin services are initialized so that `availableCameras()`
@@ -45,10 +46,13 @@ class CameraEdit extends StatefulWidget {
 class CameraEditState extends State<CameraEdit> {
   late CameraController _controller;
   late Future<void> _initializeControllerFuture;
+  final AuthService _authService = AuthService();
 
   @override
   void initState() {
     super.initState();
+    _authService.checkTokenStatus(context);
+
     // To display the current output from the Camera,
     // create a CameraController.
 
@@ -95,7 +99,6 @@ class CameraEditState extends State<CameraEdit> {
         // camera preview. Use a FutureBuilder to display a loading spinner until the
         // controller has finished initializing.
         drawer: MyDrawer(),
-
         body: FutureBuilder<void>(
           future: _initializeControllerFuture,
           builder: (context, snapshot) {
diff --git a/covas_mobile/lib/pages/DisplayPictureScreen.dart b/covas_mobile/lib/pages/DisplayPictureScreen.dart
index 73711df..e14612c 100644
--- a/covas_mobile/lib/pages/DisplayPictureScreen.dart
+++ b/covas_mobile/lib/pages/DisplayPictureScreen.dart
@@ -16,6 +16,7 @@ import '../classes/MyDrawer.dart';
 
 import '../classes/ad_helper.dart';
 import 'package:google_mobile_ads/google_mobile_ads.dart';
+import '../classes/auth_service.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -62,11 +63,14 @@ class DisplayPictureScreen extends StatefulWidget {
 class DisplayPictureScreenState extends State<DisplayPictureScreen>
     with ShowDescImageAdd, ShowAlertDialog, TickerProviderStateMixin {
   BannerAd? _bannerAd;
+  final AuthService _authService = AuthService();
 
   late AnimationController controller;
   @override
   void initState() {
     super.initState();
+    _authService.checkTokenStatus(context);
+
     AdHelper.createBannerAd(() => setState(() {})).then((ad) {
       setState(() {
         _bannerAd = ad;
diff --git a/covas_mobile/lib/pages/EditEvent.dart b/covas_mobile/lib/pages/EditEvent.dart
index 69d7691..00900f1 100644
--- a/covas_mobile/lib/pages/EditEvent.dart
+++ b/covas_mobile/lib/pages/EditEvent.dart
@@ -9,12 +9,9 @@ import 'package:textfield_tags/textfield_tags.dart';
 import 'dart:convert';
 import 'dart:io';
 
-import 'dart:typed_data';
 import '../classes/events.dart';
 import '../classes/MyDrawer.dart';
 
-import 'ItemMenu.dart';
-import 'CameraEdit.dart';
 import 'package:camera/camera.dart';
 
 import '../classes/alert.dart';
@@ -24,6 +21,7 @@ import '../variable/globals.dart' as globals;
 
 import '../classes/ad_helper.dart';
 import 'package:google_mobile_ads/google_mobile_ads.dart';
+import '../classes/auth_service.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -60,6 +58,8 @@ class EditEvent extends StatefulWidget {
 class _EditEventState extends State<EditEvent>
     with ShowAlertDialog, ShowEventDialog {
   BannerAd? _bannerAd;
+  final AuthService _authService = AuthService();
+
   TextEditingController inputName = TextEditingController();
 
   TextEditingController inputDate = TextEditingController();
@@ -315,6 +315,8 @@ class _EditEventState extends State<EditEvent>
   @override
   void initState() {
     super.initState();
+    _authService.checkTokenStatus(context);
+
     AdHelper.createBannerAd(() => setState(() {})).then((ad) {
       setState(() {
         _bannerAd = ad;
diff --git a/covas_mobile/lib/pages/EditProfile.dart b/covas_mobile/lib/pages/EditProfile.dart
index 31bde9e..c1aaea3 100644
--- a/covas_mobile/lib/pages/EditProfile.dart
+++ b/covas_mobile/lib/pages/EditProfile.dart
@@ -17,6 +17,7 @@ import '../variable/globals.dart' as globals;
 
 import '../classes/ad_helper.dart';
 import 'package:google_mobile_ads/google_mobile_ads.dart';
+import '../classes/auth_service.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -44,6 +45,8 @@ class EditProfile extends StatefulWidget {
 class _EditProfileState extends State<EditProfile>
     with ShowAlertDialog, ShowEventDialog {
   BannerAd? _bannerAd;
+  final AuthService _authService = AuthService();
+
   TextEditingController inputUserName = TextEditingController();
 
   TextEditingController inputName = TextEditingController();
@@ -198,6 +201,8 @@ class _EditProfileState extends State<EditProfile>
   @override
   void initState() {
     super.initState();
+    _authService.checkTokenStatus(context);
+
     AdHelper.createBannerAd(() => setState(() {})).then((ad) {
       setState(() {
         _bannerAd = ad;
diff --git a/covas_mobile/lib/pages/EditSettings.dart b/covas_mobile/lib/pages/EditSettings.dart
index c79e6c2..0be4c14 100644
--- a/covas_mobile/lib/pages/EditSettings.dart
+++ b/covas_mobile/lib/pages/EditSettings.dart
@@ -12,6 +12,7 @@ import '../classes/eventAdded.dart';
 
 import '../classes/ad_helper.dart';
 import 'package:google_mobile_ads/google_mobile_ads.dart';
+import '../classes/auth_service.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -39,6 +40,8 @@ class EditSettings extends StatefulWidget {
 class _EditProfileState extends State<EditSettings>
     with ShowAlertDialog, ShowEventDialog {
   BannerAd? _bannerAd;
+  final AuthService _authService = AuthService();
+
   TextEditingController inputUserName = TextEditingController();
   int? kilometer;
 
@@ -60,6 +63,8 @@ class _EditProfileState extends State<EditSettings>
   @override
   void initState() {
     super.initState();
+    _authService.checkTokenStatus(context);
+
     AdHelper.createBannerAd(() => setState(() {})).then((ad) {
       setState(() {
         _bannerAd = ad;
diff --git a/covas_mobile/lib/pages/ItemMenu.dart b/covas_mobile/lib/pages/ItemMenu.dart
index db6ae9c..8b18d0a 100644
--- a/covas_mobile/lib/pages/ItemMenu.dart
+++ b/covas_mobile/lib/pages/ItemMenu.dart
@@ -23,6 +23,7 @@ import 'EditEvent.dart';
 
 import '../classes/ad_helper.dart';
 import 'package:google_mobile_ads/google_mobile_ads.dart';
+import '../classes/auth_service.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -75,6 +76,7 @@ class ItemMenu extends StatefulWidget {
 
 class _ItemMenuState extends State<ItemMenu> with ShowAlertDialog {
   BannerAd? _bannerAd;
+  final AuthService _authService = AuthService();
 
   String listUser = "";
   String eventName = "";
@@ -91,6 +93,8 @@ class _ItemMenuState extends State<ItemMenu> with ShowAlertDialog {
   @override
   void initState() {
     super.initState();
+    _authService.checkTokenStatus(context);
+
     AdHelper.createBannerAd(() => setState(() {})).then((ad) {
       setState(() {
         _bannerAd = ad;
diff --git a/covas_mobile/lib/pages/ListItemByOrganizers.dart b/covas_mobile/lib/pages/ListItemByOrganizers.dart
index 2d8b62d..3a89580 100644
--- a/covas_mobile/lib/pages/ListItemByOrganizers.dart
+++ b/covas_mobile/lib/pages/ListItemByOrganizers.dart
@@ -11,6 +11,7 @@ import 'package:intl/date_symbol_data_local.dart';
 
 import '../variable/globals.dart' as globals;
 import '../classes/MyDrawer.dart';
+import '../classes/auth_service.dart';
 
 // app starting point
 void main() {
@@ -41,6 +42,8 @@ class ListItemOrganizers extends StatefulWidget {
 
 // homepage state
 class _MyHomePageState extends State<ListItemOrganizers> {
+  final AuthService _authService = AuthService();
+
   // variable to call and store future list of posts
 
   // function to fetch data from api and return future list of posts
@@ -60,6 +63,12 @@ class _MyHomePageState extends State<ListItemOrganizers> {
     return body;
   }
 
+  @override
+  void initState() {
+    super.initState();
+    _authService.checkTokenStatus(context);
+  }
+
   // build function
   @override
   Widget build(BuildContext context) {
diff --git a/covas_mobile/lib/pages/ListItemByTags.dart b/covas_mobile/lib/pages/ListItemByTags.dart
index 353dea8..3866cc9 100644
--- a/covas_mobile/lib/pages/ListItemByTags.dart
+++ b/covas_mobile/lib/pages/ListItemByTags.dart
@@ -12,6 +12,7 @@ import 'package:intl/date_symbol_data_local.dart';
 import '../variable/globals.dart' as globals;
 
 import '../classes/MyDrawer.dart';
+import '../classes/auth_service.dart';
 
 // app starting point
 void main() {
@@ -43,6 +44,8 @@ class ListItemTags extends StatefulWidget {
 class _MyHomePageState extends State<ListItemTags> {
   // variable to call and store future list of posts
 
+  final AuthService _authService = AuthService();
+
   // function to fetch data from api and return future list of posts
   static Future<List<Events>> getPosts(tags) async {
     SharedPreferences prefs = await SharedPreferences.getInstance();
@@ -60,6 +63,12 @@ class _MyHomePageState extends State<ListItemTags> {
     return body;
   }
 
+  @override
+  void initState() {
+    super.initState();
+    _authService.checkTokenStatus(context);
+  }
+
   // build function
   @override
   Widget build(BuildContext context) {
diff --git a/covas_mobile/lib/pages/ListItemMenu.dart b/covas_mobile/lib/pages/ListItemMenu.dart
index 58f1b1f..5ffa41d 100644
--- a/covas_mobile/lib/pages/ListItemMenu.dart
+++ b/covas_mobile/lib/pages/ListItemMenu.dart
@@ -18,6 +18,7 @@ import 'package:camera/camera.dart';
 
 import '../classes/ad_helper.dart';
 import 'package:google_mobile_ads/google_mobile_ads.dart';
+import '../classes/auth_service.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -46,6 +47,7 @@ class ListItemMenu extends StatefulWidget {
 
 class _MyHomePageState extends State<ListItemMenu> {
   BannerAd? _bannerAd;
+  final AuthService _authService = AuthService();
 
   Future<List<Events>> postsFuture = getPosts();
   List<Events> filteredPosts = [];
@@ -145,6 +147,7 @@ class _MyHomePageState extends State<ListItemMenu> {
   @override
   void initState() {
     super.initState();
+    _authService.checkTokenStatus(context);
     AdHelper.createBannerAd(() => setState(() {})).then((ad) {
       setState(() {
         _bannerAd = ad;
diff --git a/covas_mobile/lib/pages/MapboxPages.dart b/covas_mobile/lib/pages/MapboxPages.dart
index 686ddfa..8e005e9 100644
--- a/covas_mobile/lib/pages/MapboxPages.dart
+++ b/covas_mobile/lib/pages/MapboxPages.dart
@@ -11,6 +11,7 @@ import 'package:geolocator/geolocator.dart'; // For getting the user's location
 import '../classes/alert.dart'; // Assuming this contains your error dialog code.
 import '../variable/globals.dart' as globals;
 import '../classes/MyDrawer.dart';
+import '../classes/auth_service.dart';
 
 void main() async {
   await dotenv.load(fileName: ".env"); // Load .env file
@@ -44,6 +45,8 @@ class MapboxPages extends StatefulWidget {
 }
 
 class _MapboxPagesState extends State<MapboxPages> with ShowAlertDialog {
+  final AuthService _authService = AuthService();
+
   late MapboxMapController mapController;
   late String mapboxAccessToken;
   List<LatLng> routeCoordinates = [];
@@ -58,6 +61,8 @@ class _MapboxPagesState extends State<MapboxPages> with ShowAlertDialog {
   @override
   void initState() {
     super.initState();
+    _authService.checkTokenStatus(context);
+
     _getUserLocation();
   }
 
diff --git a/covas_mobile/lib/pages/UpdateEventImage.dart b/covas_mobile/lib/pages/UpdateEventImage.dart
index 30823c5..2d46d2c 100644
--- a/covas_mobile/lib/pages/UpdateEventImage.dart
+++ b/covas_mobile/lib/pages/UpdateEventImage.dart
@@ -18,6 +18,7 @@ import '../variable/globals.dart' as globals;
 
 import '../classes/ad_helper.dart';
 import 'package:google_mobile_ads/google_mobile_ads.dart';
+import '../classes/auth_service.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -51,6 +52,7 @@ class UpdateeventImage extends StatefulWidget {
 class _UpdateeventImageState extends State<UpdateeventImage>
     with ShowAlertDialog, ShowEventDialog {
   BannerAd? _bannerAd;
+  final AuthService _authService = AuthService();
 
   TextEditingController inputName = TextEditingController();
 
@@ -316,6 +318,8 @@ class _UpdateeventImageState extends State<UpdateeventImage>
   @override
   void initState() {
     super.initState();
+    _authService.checkTokenStatus(context);
+
     AdHelper.createBannerAd(() => setState(() {})).then((ad) {
       setState(() {
         _bannerAd = ad;