Custom Debug implementation for User but not Credentials in SQLite example?

[homeworkprod]

examples/sqlite/src/users.rs has a custom Debug implementation for User "to avoid accidentally logging the password hash."

Credentials has a field password, too, but derives Debug.

Shouldn't Credentials have a custom Debug implementation that redacts the password as well by that logic?

[maxcountryman]

We could also use something like redact.

Updating the example with a custom Debug impl is a great starting place if that's easier.