Each login triggers a `store` delete and insert

[jimchamp]

On login, the associated account data is deleted from the store, then a new account object is written to the store. The only field that changes in the object is the last_login date.

This can be confirmed easily with the default openlibrary account in any Open Library local instance:

docker compose exec db bash
psql -Uopenlibrary
select store_id from store_index where type = 'account' and name = 'username' and value = 'openlibrary';

# Note the `store_id` from the result set, logout, login again, then re-run the query.
# The `store_id` will be different.

[jimchamp]

Noting that a delete from or insert into the store table via the API triggers the same action multiple times on the store_index table.