Update app.py

app.py

@@ -1,7 +1,7 @@
 import gradio as gr
 from openai import OpenAI
 
-client = OpenAI()
+client = OpenAI(api_key="")
 
 def echo(message, chat_history):
         bot_message = 'echo ' + message
@@ -9,8 +9,8 @@ def echo(message, chat_history):
         return '', chat_history
 
 def is_api_key_valid(api_key):
+    client.api_key = api_key
     try:
-        client.api_key = api_key
         response = client.chat.completions.create(
             messages=[{"role": "user", "content": "Testing"}],
             model="gpt-3.5-turbo",