Update app.py

passing auth details from environ

app.py

@@ -1,5 +1,6 @@
 
 import gradio as gr
+import os
 
 from utils import *
 
@@ -40,4 +41,4 @@ with gr.Blocks() as demo:
 #     gr.Examples(["My name is Clara and I am"], inputs=[seed])
 
 if __name__ == "__main__":
-    demo.launch(auth=('sense', 'codefest123'))
+    demo.launch(auth=(os.environ['username'], os.environ['password']))