You have to create a forum account, delete your tenants, then request that they delete your account via a direct message on the forums (???), then you have to delete the forum account.

https://community.auth0.com/t/how-can-i-delete-my-auth0-auth0-community-forum-account/34689

This account deletion procedure is so wacky. Makes me never want to use Okta or Auth0 again. Is Okta's account deletion procedure any better? AFAICT they have you open a support ticket, which is almost as bad.

https://support.okta.com/help/s/question/0D50Z00008G7UohSAF/how-to-delete-my-okta-account?language=en_US