Can't find navigation root after success-full login?

I clone this repo for one of my firebase project it works perfect but after success-full login i can't find a navigation in your code can you please help me with that. I get stuck from the in the flow after ```auth_widget.dart``` file.

Start by reading auth_widget.dart and trace what happens after successful login. The issue does not identify a navigation entry point or a requested code change, so confirm the intended post-login destination before investigating further; done would mean the expected navigation is identified and works after authentication.

Written by the indexing model from the issue text.