Adding a user

I am trying to add a new user to my system. The problem I am encountering is that I first created the Vera account for this user.
If I try to add the user from whithin UI7 it tellsme that username or email address is arleady in use. If I try to add the user from the Vera setup portal it tells me that the controller is already assigned to someone else

how can I add the new user without having to create a new email account for them?