The user's account name.
Only letters, numbers, and the following special characters can be added: underscore, dash, single quote, and period (_, -, ', and .).
Username cannot start or end with period (.). admin, system, administrator, and root are reserved names for system admin only with case ignored.
passwordstring required
The password of user.
domainstring
The SIP domain of tenant.
It is usually a fully qualified domain name (FQDN).
If there is no FQDN, you can also use the IP address of the PBX server as the SIP domain.
The SIP domain name is only used for SIP message authentication and does not require analysis.