Update app.py

app.py

@@ -291,7 +291,12 @@ def build_gradio_app():
     return demo
 
 
-if __name__ == "__main__":
-    demo = build_gradio_app()
-    demo.queue().launch(show_api=False)
+    USER = os.environ.get("APP_USER", "")
+    PWD  = os.environ.get("APP_PASS", "")
 
+    # require basic auth for every viewer
+    demo = build_gradio_app()
+    demo.queue().launch(
+        show_api=False,
+        auth=(USER, PWD)
+    )