🌟 Ability to let attendee cancel ticket #905
Description
ℹ️ Please check if the feature you're requesting already exists in the project's roadmap or issues.
Is your feature request related to a problem? Please describe.
Sometimes a attendee cannot attend the event, so it should be possible for the user to cancel the ticket themselves.
Describe the solution you'd like
Add a button to cancel the ticket on the "view ticket" page. In addition to that, add a message in the email confirmation, if you cannot attend the event, please cancel [here].
After the ticket is cancelled, it should be marked as cancelled, as the organizer would cancel it, and the ticket capacity should go back into the availability pool.