This optional parameter specifies the PAP password required
for access by a WiMAX HA (Home Agent). If not defined, HA does not have to
present a password before its requests are satisfied. If HAPassword is
defined, the HA must present a PAP password with an exact match, and the
HA must be configured to send this password, otherwise its requests will
be REJECTed. Not all HAs are able to send a password with requests to the
HAAA, so use of this parameter depends on your HA. Defaults to
undefined.