[Serusers] terminating to nufone or other providers

Ok, so i'm tryin to get ser to work with Long distance calling, however I dont know how to authenticate to nufone...

# send out 00 prefix to wholesale voip.brujula.net termination if (uri=~"^sip:00[0-9].*@.*") { if (!is_user_in("From", "ld")) { sl_send_reply("403", "Payment required"); break; }; setflag(1); rewritehostport("voip.nufone.net:5060"); if (!t_relay()) { sl_reply_error(); }; break; };

Should this be: rewritehostport("user:pass@voip.nufone.net:5060"); ??

Barry