Delete the account with the workspaces nobody else uses

confirm must be the phone number or the email of the account. Answers 409 with code delete_blocked and delete_blockers while the account owns workspaces of other people, 403 with code reauth_required when the sign-in is older than 15 minutes, 503 with code billing_unavailable when nothing was deleted because a subscription could not be canceled, and 503 with code delete_incomplete when the workspaces were already being closed but the account was not deleted.