[Freeswitch-users] Gateway auth username

Hi! Hopefully an easy question... What is the parameter to define the authorization username for a gateway? <param name="username" value="didnumber"/> <param name="password" value="password"/> I also need something like: <param name="auth-user" value="username"/> I've tried auth-user, auth-username, extra-auth-user etc, but none seem to work.... Thanks! /Mark