event.source.user_id

main.py

@@ -59,7 +59,7 @@ def callback():
 @handler.add(MessageEvent, message=TextMessageContent)
 def handle_message(event):
     response = model.generate_content(event.message.text)
-    print(f"UserID: {event.source.userId}")
+    print(f"UserID: {event.source.user_id}")
     print(f"Q: {event.message.text}")
     print(f"A: {response.text}")
     with ApiClient(configuration) as api_client: