Update multi_agent.py

multi_agent.py

@@ -52,7 +52,7 @@ def run_multi_agent(llm, message):
 
     chat_history = ""
     
-    for message in chat_result["messages"]:
+    for message in chat_history.messages:
         chat_history += f"Role: {message['role']}, Content: {message['content']}\n"
     
     image_data = read_image_file("/home/user/app/coding/ytd_stock_gains.png")