I'm using HS API on my website to show forms, that allows to download some contents. Example: LINK.
It is required to provide email address, but if person provides unsubscribed email he will not receive any information from HS. So I want to implement custom resubscription information - simmilar to one described here (at the bottom): https://knowledge.hubspot.com/email-user-guide-v2/set-up-resubscription-emails-for-forms-and-pop-up-forms
There should be link that points user to his email subscription page, but I don't know how to create the URL.
Address should contain string that identifies user:
How to obtain this ID?