Update app.py

app.py

@@ -4,6 +4,10 @@ import streamlit as st
 
 # Set your OpenAI API key as an environment variable
 openai.api_key = os.getenv('OPENAI_API_KEY')
+client = OpenAI(
+    # This is the default and can be omitted
+    api_key=os.environ.get("OPENAI_API_KEY"),
+)
 
 def chat(user_message):
     response = client.chat.completions.create(