Setting this object to 'doAction (1)' triggers
an attempt to match the tmnxLocUsrDbPppoeAuthUsrName to a PPPoE user
in the tmnxLocUsrDbPppoeTable. If a user is found and the value of
tmnxLocUsrDbPppoeAuthPwd is not the empty string, the password will be
verified.
Reading this object returns the value 'notApplicable'.