Move TelegramClient.list_sessions to *Session.list_session

telethon/tl/session.py

@@ -145,6 +145,14 @@ class JsonSession:
         except OSError:
             return False
 
+    @staticmethod
+    def list_sessions():
+        """Lists all the sessions of the users who have ever connected
+           using this client and never logged out
+        """
+        return [os.path.splitext(os.path.basename(f))[0]
+                for f in os.listdir('.') if f.endswith('.session')]
+
     @staticmethod
     def try_load_or_create_new(session_user_id):
         """Loads a saved session_user_id.session or creates a new one.