Update app.py

app.py

@@ -54,10 +54,10 @@ with gr.Blocks() as demo:
     clear = gr.Button("Clear")
 
     def respond(openai_api_key, message, chat_history):
+        openai.api_key = openai_api_key
         if not openai_api_key:
             return "No OpenAI key provided, please provide one.", chat_history
         try:
-            openai.api_key = openai_api_key
             index = load_index_from_storage(storage_context)
             query_engine = index.as_query_engine(similarity_top_k=3)
             response = query_engine.query(message)