fix

app.py

@@ -3,8 +3,9 @@ from openai import OpenAI, APIConnectionError, BadRequestError
 from gradio_client import Client
 import os
 from dotenv import load_dotenv
-
-load_dotenv()
+# Load environment variables from .env file if it exists -- otherwise use hf secret
+if os.path.exists('.env'):
+    load_dotenv()
 access_token =  os.getenv('PRIVATE_ACCESS_KEY') #both in hidden env & hf secrets.
 client = Client("neuronslabs/Text_modulator", hf_token=access_token)