[galaxy-dev] use external authentication bare username as email address without appending any email domain

Hi, Is it possible to tell Galaxy to use the bare username passed back by external authentication as the email address without appending any domain? It seems to complain if it isn't in email address format and asks you to set up a domain to append in universe.wsgi. I would like to use the bare username as the email address since it works fine as an email address in for example any Active Directory-based organization and also in many non-academic organizations it is preferred not to use the email addresses as the ID. thanks in advance, Leandro