Added hugging face config

stream_app.py

@@ -404,8 +404,8 @@ def parse_args() -> dict:
 if __name__ == "__main__":
     os.environ['GRADIO_ANALYTICS_ENABLED'] = 'False'
     api_key = os.getenv("OPENAI_API_KEY")
-    # if not api_key:
-    #     raise ValueError("OPENAI_API_KEY environment variable not set as environment variable or as a setting in `.env`.  (see https://platform.openai.com/docs/quickstart/step-2-set-up-your-api-key)")
+    if not api_key:
+        raise ValueError("OPENAI_API_KEY environment variable not set as environment variable or as a setting in `.env`.  (see https://platform.openai.com/docs/quickstart/step-2-set-up-your-api-key)")
 
     config = parse_args()
     run_gradio(config)