Update app.py

app.py

@@ -44,7 +44,7 @@ async def get_df(name: str):
     dataset = load_dataset(str, split="train")
     return dataset
     
-async def store_message(name: str, message: str):
+async def store_message(name: str, message: str) -> str:
     if name and message:
         with open(DATA_FILE, "a") as csvfile:
             writer = csv.DictWriter(csvfile, fieldnames=[ "time", "message", "name", ])