Need OAuth help

Thank you so much. This helps a lot. The one part I am still confused about the following part:

I remember getting an authorization panel where I agreed to the scopes but I did not set up a separate website for that. In fact, I tried so many things that I somehow just stumbled into that authorization screen. It think it came up when I logged into my channel but I don’t remember. Is there somewhere this is documented or an example of this? Thanks again.