Show new config approach

Per https://disqus.com/by/ashfaqnisar/?utm_source=reply&utm_medium=email&utm_content=comment_author

I was following through the course and assigning the roles to the accessToken using the rules option in the auth0. Works like a charm!. But, it seems that auth0 now has a tab of roles option in the dashboard, which can add the permissions of the user directly into the accessToken without us writing any sort of rules. Similar to the one you talked about the role in the "authentication approach options". If you do update the course in the future, can you please also keep place this thing.

Thanks