I need to send to an external API events when user is registrated and de-registrated. As far as I understand standart behaviour is as follows:
If user is not registered, he sends REGISTER and he is registrated (I can catch that because I make the auth). If user is registered and sends REGISTER he is de-register. (Please correct me if I'm wrong.) How can I catch that? Can I use event_route[usrloc:contact-expired]?