Expose events or a listener for emails sending

[vabatta]

Hi,

I'm trying out the lib and looks great. The only thing is that we have a queue in prod for sending out notifications (or emails/sms, depends on context) for things such as codes or tokens.
It would be great if the library exposes that as part of the adapter (https://authjs.dev/reference/core/adapters) so that we can wire up our own infrastructure for sending notifications instead of being bound to use node mailer.

Cheers

[vabatta]

Looks like something could be done using: https://authjs.dev/guides/providers/email#custom-email-service

We might look into this.