Update app.py

app.py

@@ -35,11 +35,11 @@ def chat(message, history):
     # see https://platform.openai.com/playground/assistants.
     # On subsequent runs, load assistant.
     if assistant == None:
-        #try: 
+        try: 
             #assistant = create_assistant()
-        assistant = load_assistant()
-        #except:
-        #    raise gr.Error("Please clone and bring your own credentials.")
+            assistant = load_assistant()
+        except AuthenticationError:
+            raise gr.Error("Please clone and bring your own credentials.")
 
     # TODO: Use Gradio session to support multiple users
     if thread == None or len(history) == 0: