I didn’t assume that you aren’t using code. However, you asked, " Is there any way we can register people as Members skipping the confirmation email?" You can register members through the Dashboard. See Approving a Site Member . Since this is a non-code issue, i f you need further details or clarification, I would recommend contacting Wix Customer Care .
One coding possibility you might consider is the register() API . That will require some coding to put that in place, but since you are already using code you shouldn’t have a problem.