How Do I Create An API Workflow To "Unsubscribe" Someone?

I have notifications as a Thing in the app.

How can I create a link in the email footer of this notification that clicks back to Bubble and turns OFF the notification?

The user is not created, only a notification is created…

So how is it possible to create an API workflow and “find” the notification and turn it OFF?

I have a similar question. The difference the user is created but is not logged in. However I would like to unsubscribe the user by sending a page parameter which will unsubscribe the user. The parameter would identify the user and thus know what record to change.

Any thoughts?

Solved as follows:

Upon user action (button) to unsubscribe:

DO SEARCH for User
Click on DO SEARCH to bring up Search for Users panel and indicate constraints
The TYPE is User (or name of your user thing)
CONSTRAINT uniqueIDforThisInUserTable = GET FROM PAGE URL
CLICK on Get From page URL and you get a panel to enter the name of the external URL
You get: GET FROM WHATEVERPARAMETER FROM PAGE URL.