npppd_get_ppp_by_user
if ((u = npppd_get_ppp_by_user(_this, ppp->username))
if ((uppp = npppd_get_ppp_by_user(_this, ppp->username)) != NULL) {
slist *npppd_get_ppp_by_user(npppd *, const char *);
users = npppd_get_ppp_by_user(_this, username);