I have a simple model where users have one or more emails and
after_create is used to send new users a Welcome email. If I create
and save a User then after_create is triggered but there is no email
associated with the user. But the problem is that to add an Email to a
User I need to have an id for User which only happens after a save.
So is there a way to create both an Email and a User such that when
the after_create for a user is called, the user has an associated