Update subscriber "updated at" field on unsubscribe

[t3hmrman]

Is your feature request related to a problem? Please describe.
Maybe it's a philosophical issue, but I consider an unsubscribe to be an "update" to subscriber information (just one that the administrator didn't perform). Listmonk currently does not update the "updated at" column when a subscriber unsubscribes, despite the subscriber data changing.

Describe the solution you'd like
Updating the updated at field when a subscriber unsubscribes.

[knadh]

The subscriber_lists table that holds the actual subscription also has an updated_at field. It would be more appropriate to update that instead of the subscriber's own updated_at I'd think.

[t3hmrman]

Ahhh that makes sense -- the subscriber_lists table is the relation table (so one might think of it like a subscriptions table?) -- if that's the case it does make much more sense to categorize this as an update to the subscription rather than the user per-say.

[peterjcarroll]

I realize that is an old, closed issue, but a use case I have where this would be helpful: I am attempting to get users who are new/updated from the API.

I'm calling the api using this url:
/api/subscribers?query=subscribers.updated_at>'2023-11-15'
and right now it won't give me users who have unsubscribed recently.

Is there another way to query the api to get that info? I tried using the url
/api/subscribers?query=subscriber_lists.updated_at>'2023-11-15'
but that returns no results.

I highly prefer using the api vs querying the database directly.