We find that sometimes we need to email users from ListenBrainz. This could be to inform them that their spotify import failed, or because we think that they might be submitting untrustworthy data to LB.

We should double-check if users can create an LB account without first verifying their email address on musicbrainz. If they can, we should work out a way to require them to first verify their email address.

We need a way to address existing users who may have snuck around this limitation until now.