I would like to Uniquely identify each window or tab controlled by the Service Worker, I've read about clienId and the only way I figured I can achieve its value is by FetchEvent: https://developer.mozilla.org/en-US/docs/Web/API/FetchEvent/clientId
As far as i think about it, each client should have clientId assigned on registration, so I'm sure there must be a way to get it immediately after registration "then" function and just didn't figure out how, thanks for helping :)
