print joined rooms

whisper.py

@@ -51,6 +51,7 @@ async def main() -> None:
     await client.sync()
     for room in client.invited_rooms:
         await client.join(room)
+        print(f"joined room {room}")
     # Watch out! If you join an old room you'll see lots of old messages
     await client.sync_forever(timeout=30000)  # milliseconds