Add triggers for onCreate and onDelete

[gijswobben]

The triggers described here are not available yet in the library: https://firebase.google.com/docs/functions/auth-events

[jhuleatt]

This is currently a limitation of all 2nd gen functions (Node or Python). beforeusercreated and beforeusersignedin are available, but 1st gen functions' Auth onCreate and onDelete are not yet available for any 2nd gen functions.

A less-than-ideal workaround for now is to use 1st gen functions (Node only) for Auth onCreate and onDelete triggers.

[rehmatsg]

Do we have any timeline for when this might be implemented?

[erdenebayrd]

this

I want to know we have any timeline