Versioning
We have a vague goal of versioning: we would like the versions of @associ/{users,users-db,users-db-mongo,users-db-pg} to move in lockstep, so the same version across the board is exactly compatible with the others.
As per 8/9 2022 we have not been doing this yet.
Additionally, when doing major version bumps we should remove all deprecated functionality. Find it by searching for deprecate which is used to mark these places and print deprecation warnings.