Webform unsubscribe

The module provides [webform_submission:delete-url] token that enables to create the link for
removing a webform submission. The link can be sent via email to a user. Users can be anonymous.

The possible use case:
A user register for an event via submitting a webform. After that, he gets the email that contains the link that enables to unregister. And if a user click the link, his submission will be removed.

Uses

1. Visit /admin/structure/webform/manage/{YOUR WEBFORM}/settings/submissions
2. Check the "Allow users to delete a submission using a secure token" option.
3. Input a text that should be displayed after a submission deletion. For instance, "You have been successfully unsubscribed!"

After that you can use the [webform_submission:delete-url] token to get the URL that can be used for deleting a submission.
Using this URL you can create a link and insert it into an email that will be sent to a user.
For instance, like this: <a href="[webform_submission:delete-url]">Unsubscribe</a>