[Users] registration method

[buxalex at libero.it]

Hello,

when a softphone try to register to my openser, the user and password are checked into mysql db, before to allow it.

I would like to know how it is done, because, as I know, the REGISTER method doesn't have the user/password data embedded.
So how openser knows about these data?

I am asking it, because I am writing a SIP softphone, and I dont know how to pass these informations....

Thanks
Alessandro