chore: refactor telegram api

lib/api/telegram/client.js

@@ -139,6 +139,19 @@ export default class TelegramClientApi {
         return this.#call( "getMe" );
     }
 
+    async checkAuthentication () {
+        const isAuthenticated = await this.#client.checkAuthorization();
+
+        if ( isAuthenticated ) {
+            this.#authenticated = true;
+        }
+        else if ( this.#authenticated ) {
+            this.#authenticated = false;
+
+            this.#events.emit( "signout" );
+        }
+    }
+
     async sendMessage ( ...args ) {
         return this.#call( "sendMessage", ...args );
     }