add pin login and add pin code

lib/pages/main/model/main_model.dart

@@ -17,6 +17,7 @@ class MainModel extends ChangeNotifier {
 
   String? messagingToken;
   User? user;
+  User? _fbUser;
   PackageInfo? packageInfo;
 
   set setMessaginToken(token) {
@@ -29,6 +30,9 @@ class MainModel extends ChangeNotifier {
   bool isLoaded = false;
   bool isOnline = false;
   bool isFirstLaunch = false;
+  bool isLockOn = false;
+
+  bool get isPinLogin => user?.isPinLogin ?? false;
 
   MainModel() {
     NetworkConnectivity.instance.statusStream.listen((data) {
@@ -83,6 +87,7 @@ class MainModel extends ChangeNotifier {
     await _listenSetting();
     this.isFirstLaunch = await SharedPref.isFirstLaunch() ?? true;
     this.packageInfo = await PackageInfo.fromPlatform();
+    this.isLockOn = await SharedPref.getPinLockOn() ?? false;
 
     userListener?.cancel();
     userListener =
@@ -91,6 +96,17 @@ class MainModel extends ChangeNotifier {
       bool diffPrivilege =
           _user != null && (user == null || user!.diffPrivileges(_user));
       bool loggingOut = user != null && _user == null;
+
+      if (_user != null) {
+        if (!_user.isPinLogin) {
+          _fbUser = _user;
+        }
+      }
+
+      if ((_fbUser?.id == _user?.id)) {
+        _user?.pinToken = null;
+      }
+
       user = _user;
 
       if (_user != null) {
@@ -101,6 +117,7 @@ class MainModel extends ChangeNotifier {
           }
         }
       }
+
       if (loggingOut) {
         for (final m in models) {
           m.logout();
@@ -196,4 +213,13 @@ class MainModel extends ChangeNotifier {
   Future<void> deleteAccount() async {
     return await Services.instance.authService.deleteAccount();
   }
+
+  Future<void> pinLogin({required String fcsID, required String pin}) async {
+    await Services.instance.authService
+        .pinLogin(fcsID: fcsID, pin: pin, currentUserId: _fbUser?.id ?? '');
+  }
+
+  Future<void> logoutPinAccount() async {
+    await Services.instance.authService.logoutPinAccount();
+  }
 }