Update app.py

app.py

@@ -30,7 +30,7 @@ from assistants import (
 
 def chat(message, history, openai_api_key):
     if not openai_api_key:
-        raise gr.Error("OpenAI API Key is required.")
+        raise gr.Error("OpenAI API Key is required (see additional inputs below).")
     if not message:
         raise gr.Error("Message is required.")
 
@@ -93,5 +93,5 @@ gr.ChatInterface(
         cache_examples=False,
         additional_inputs=[
             gr.Textbox("", label="OpenAI API Key")
-          ],
+        ],
     ).launch()