diff --git a/lib/api/telegram/client.js b/lib/api/telegram/client.js
index cccbf4279..385e929d2 100644
--- a/lib/api/telegram/client.js
+++ b/lib/api/telegram/client.js
@@ -24,6 +24,7 @@ export default class TelegramClientApi {
     #client;
     #events;
     #listeners = {};
+    #authenticated;
 
     constructor ( { apiId, apiHash, session, deviceModel, appVersion, connectionRetries = Infinity, logLevel, connect, ...options } = {} ) {
         this.#activityManager = new ActivityManager( {
@@ -60,6 +61,10 @@ export default class TelegramClientApi {
         return this.#client.connected;
     }
 
+    get isAuthenticated () {
+        return this.#authenticated;
+    }
+
     // public
     async createSession ( { accountId, phoneCode, password } = {} ) {
         if ( !accountId ) {
@@ -170,10 +175,13 @@ export default class TelegramClientApi {
         const res = await this.#client
             [ method ]( ...args ) // eslint-disable-line no-unexpected-multiline
             .then( data => result( 200, data ) )
-            .catch( e =>
-                result.catch( e, {
+            .catch( e => {
+                if ( e.code === 401 ) this.#authenticated = false;
+
+                return result.catch( e, {
                     "log": false,
-                } ) );
+                } );
+            } );
 
         this.#activityManager.finishActivity();