Update app.py

app.py

@@ -1,8 +1,8 @@
 from openai import OpenAI
 import gradio as gr
-
-
-client = OpenAI(api_key=OPENAI_API_KEY)
+import os
+api_key = os.getenv("OPENAI_API_KEY")
+client = OpenAI(api_key=api_key)
 
 def predict(message, history):
     history_openai_format = []