There was used a wrong macro to produce an error message when mailing
the user his password was reset failed. It was using `error!()` which
does not return an `Err` and aborts the rest of the code.
This resulted in the users password still being resetted, but not being
notified. This PR fixes this by using `err!()`. Also, do not set the
user object as mutable until it really is needed.
Second, when a user was using the new Argon2id KDF with custom values
like memory and parallelism, that would have rendered the password
incorrect. The endpoint which should return all the data did not
returned all the new Argon2id values.
Fixes#3388
Co-authored-by: Stefan Melmuk <509385+stefan0xC@users.noreply.github.com>