Update app.py

app.py

@@ -30,7 +30,7 @@ Tell me what topic you want to discuss and what kind of help you want. For examp
 #model = "gpt-3.5-turbo" # free and fast
 #model = "gpt-4" # latest and greatest, not yet available
 
-def CustomChatGPT(message, history, user_name):
+def CustomChatGPT(message, history):
     history_openai_format = [{"role": "system", "content": sys_message}]
     for human, assistant in history:
         history_openai_format.append({"role": "user", "content": human})