If you have ever registered for any show, current or past, you already have a user account.
You should
login with that user account.
If you receive a message that your email address is already in use, it means you have created a user account for another show in the past. If you cannot remember your password,
you can reset it here.
Each attendee must register using their own email address. Multiple attendees are not able to register using the same email address.