Update app.py

app.py

@@ -31,7 +31,7 @@ def get_random_joke()-> str: #it's import to specify the return type
         return f"Failed to retrieve joke. Status code: {response.status_code}"
 
 @tool
-def get_user_row(user_name: str) -> str:
+def get_user_row(username: str) -> str:
     """A tool that fetches more information about the user in a .csv file.
     Args:
         user_name: A string that's the user name.