Is there a document or tutorial about “Authorization”?
The RBAC cookbook is probably what you’re looking for. There’s a couple places with information about Auth that are more focused on authentication, but there’s also some community work around authorization as well.
If you follow the tutorial towards the end there’s an auth section which is focused on Netlify Identity, we’re currently working on getting authorization built in to this section.
There is also a section in the docs that describes other ways to implement Auth including Auth0, GoTrue-JS, Magic Links, Firebase, and Supabase.
The awesome-redwood repo also has a collection of links with community write ups for various methods of doing auth.