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I have started reading this book and so far it is great. Only issue I have so far is that the authentication/login with auth0 is not really explained. In chapter 2 it mentions that there is a login screen and if users are not logged in then they will be presented with this screen.

There is then just mention of including the auth0 libraries, and when using the code provided from github to update the domain/client id with our own account information in the appendices.

When looking at the source on github there seems to be a LoginService, LoginController, etc, that have no explanation in the book.

Where can I find more info on how this works?