Update app.py

app.py

@@ -32,10 +32,12 @@ def chat(message, history, openai_api_key):
         raise gr.Error("Message is required.")
 
     #raise gr.Error("Please clone and bring your own credentials.")
-    os.environ["OPENAI_API_KEY"] = openai_api_key
     
-    global assistant, thread
+    global openai_client, assistant, thread
 
+    if openai_client == None:
+        openai_client = OpenAI(api_key=openai_api_key)
+    
     # On first run, create assistant and update assistant_id,
     # see https://platform.openai.com/playground/assistants.
     # On subsequent runs, load assistant.