add authen func

app.py

@@ -180,7 +180,9 @@ if __name__ == '__main__':
     # QAQuery("what is COFOR ?")
     # CreatDb_P()
     # QAQuery_p("what is GST ?")
-    demo.queue().launch()
+    username = os.getenv("username")
+    password = os.getenv("password")
+    demo.queue().launch(auth=(username, password))
     pass