To comply with GDPR, you should already offer possibility to delete accounts on your site, either by the user or by the admin:
If each user has an option to delete the account: the URL should point to a guide showing the way users can delete their accounts.
If the accounts are deleted by an admin: then you should have a section – usually in the Privacy Policy – with the contact details, where users can send their account erasure requests. In this case the URL should point to this section of the document.
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