The user-name command specifies an NACM user for an NACM user group.
The undo user-name command deletes an NACM user from an NACM user group.
By default, no NACM user is specified for an NACM user group.
To allow an NACM user to use the rules in an NACM rule list, create an NACM user group in the NACM view, run the user-name command to add the NACM user to the user group, and then associate the created NACM user group with the rule list.
NACM users must be SSH users that have been created on devices.