Je ’m wanting to add three site administrators to aar2014.thatcamp.org/ in order to design and organize the site in advance of taking registrations. When I click on the « Add New User » languette, it actually takes me to a page that says « Add Existing User. » I was able to add two of the three team members who I know had attended a THATCamp before by entering their email address and then clicking « Add Existing User. » But when I try to create a administrative user profile for a person who has not been to or registered for a THATCamp before, I type in their email address and get a « The requested user does not exist. » notice.

How do I go about manually adding users to a THATCamp site before registration has been opened?

Merci!