If you are already registered in the event, and you want to join an existing group, this change most commonly needs to be authorized by the Event Organizer, so you'll need to contact them.
If you are e-mailing the Organizer, be sure to include:
- Your name and e-mail address used during registration.
- The name of the Group you want to join.
- The name of the Group Captain (or another Group Member) of the Group you want to join.