call as a registered user

[xyswitchz]

how would i place a call  as a registered user with username and password

something like?
sip/sip:number@server;username=xxxx;password=xxxx

[Monica Tepelus]

You want to call that user as well? I mean you want to make a call on the user's behalf and call the user and the other party and connect them?

[xyswitchz]

basically I  do not wan to use the accfile.

I want to make a outbound call connect to dumb/. The outband call to be authenticated with the remote server by adding the credentials  on the regex

[Monica Tepelus]

SIP doesn't work like that. Authentication is different from placing the call. You can't do this in a single step.
Basically you want to make a call, the other party rejects the call asking for authentication, you authentify, and then you place the calls. This happends in multiple SIP messages.