Once logged in, you can go to your profile page (using the "Profile" link at the top-right corner) and click on the "Request account deletion" link.
If you cannot log in any more, please contact us at contact@imcdb.org with the e-mail address that you used for registration.
The request will be processed within 24 or 48h in general (exceptionally, in case of vacation it can take a few more days).