re-add username anad password

app.py

@@ -259,8 +259,8 @@ with gr.Blocks() as demo:
         chatbot=gr.Chatbot(height=300),
         additional_inputs=knowledge_bases,
     )
-# demo.launch(auth=(os.environ.get("GRADIO_USERNAME"), os.environ.get("GRADIO_PASSWORD")))
-demo.launch()
+demo.launch(auth=(os.environ.get("GRADIO_USERNAME"), os.environ.get("GRADIO_PASSWORD")))
+# demo.launch()
 
 # Set it back to empty when a session is done
 # Is there a better way?