Fix auth call

app.py

@@ -149,4 +149,4 @@ with gr.Blocks(theme=gr.themes.Base(), css="footer {visibility: hidden}") as mai
             outputs=[result_image, lbl_console, html_credits, btn_buy], 
             allow_flagging='never'
             )        
-main.launch(auth=auth.authenticate)
+main.launch(auth=authenticate)