Auth_Id generation and storage

[skwzrd]

Hello,

The docs at https://quart-auth.readthedocs.io/en/latest/discussion/design_choices.html#auth-id-meaning state

The auth_id is so called, rather than being called a user_id to discourage the use of the user’s ID.

If we shouldn't use the user's id, then it seems like we need a mapping between the two ids in a memory store, database, or whatever. Is this taken care of in any existing packages?