Merge pull request 'splash_scren' (#156) from splash_scren into main

Reviewed-on: https://repo.ravanertebat.com/TM/tm_app/pulls/156

lib/data/services/auth_service.dart

@@ -113,4 +113,13 @@ class AuthService {
 
     return result;
   }
+
+  Future<Result<bool>> checkIsLoggedIn() async {
+    final prefs = await SharedPreferences.getInstance();
+    final token = prefs.getString('bearer');
+    if (token == null) {
+      return const Result.ok(false);
+    }
+    return const Result.ok(true);
+  }
 }