Add beter ways to query users as an admin

[janglad]

You can not query the auth.users table. I get why this is, but the provided admin api's are quite lackluster. An obvious gap is that you can not get a user by their email address, if you wanted to do this you'd need to query your public.users (assuming you have one), and then get the user by the id you retrieve that way.

The specific reason I ask for this though is because I'd like to get some analytic data. Like get a total user count, get count of users that have signed in the last month, ... . Obviously you could solve this with functions in Supabase itself, but this IMO not an ideal solution.