To add an Event Restricted user, follow these steps:
1.) Login to your account and click on the Settings tab.
2.) Select Add or Edit Users from the list on the left hand side.
3.) From here you can edit or add a new user.
4.) Click Add New User
5.) Click Add user when all information has been entered.
6.) Now you can go into any event and edit the users. You can also do this when you are in the event creation process.