I want to use screen names instead of email addresses for
signing in and distinguishing users. (email addresses will still
be required and, of course, unique) This obviously means the
screen names have to be unique and not null. First of all, how
do I change the data model to reflect that?
Second of all, what pages do I have to change to allow for this?
Do I just need to change the registration pages? It appears that,
after registration/login, user state is conserved by passing just
user_id. Is this correct?
Thank you..
