The type of web authentication for the clients.
Web Authentication can be of three types;
internalDefault - The default login page will be
presented to the client for authentication.
internalCustom - The administrator has created and
uploaded a custom login page and it will be
presented to the clients for authentication.
external - This value indicates that the login page
will be served from the external web server. Note
that cLWAWebAuthType can be successfully set to this
value when the cLWAExternalWebAuthURL object has been
set to string with non-zero length.