Registrations for the Events Calendar Pro has several features that integrate with WordPress’ user system. This means that many membership plugins also integrate with these features.

Here is a list of some of them:

• Restrict registration to logged-in users. Display a log-in form when users are logged-out and visiting a page with a registration form.
• Display an attendee list for logged-in users only.
• Pre-fill form fields with user information.
• Allow users to edit their own registration, cancel a registration, or complete a payment after registering.
• Display a list of events that users have registered for. See this FAQ.
• Give a discount to logged-in users when paying for registration.