I'm a participant, can i edit my information or cancel my registration?
You can go to your account and see your list of "Registrations" via the dropdown menu. Select the tournament you want to edit your information in.
Once here, you can edit your information or cancel your registration via the "My registration" action in the tournament navigation. Note that the current status of your registration is important when editing the information, so check this guide for more details on the process.
