Allow students / parents to cancel drop-ins

We use the system for adult drop-in classes. Right now, they can't cancel a drop-in on their end if something comes up, or they get sick. They hae to email us and we have to manually remove them from the class. It would be SO helpful if we could have them unenroll from a drop-in from the DSP portal! It would benefit students and also our staff and streamline our adult class registration process. Thanks!