Missing auth docs

[howesteve]

So in https://supabase.io/docs/guides/auth we have:

"When users sign up, Supabase assigns them a unique ID. You can reference this ID anywhere in your database. For example, you might create a profiles table referencing the user using a user_id field." - and no other info available.

It took me a good time to guess those infos are on a separate auth schema:

select * from auth.users;

Please, this should be documented.

[thebengeu]

Thanks Steve for your feedback! There are a few references to auth.users further down that doc, but this could indeed be clearer up top, sent out #3139 to fix.