This function takes the following parameters:
Pointer to the handle of the auth context.
Organization name to authenticate to. May be NULL to use value in property file.
The alias of the certificate to be used if the client is connecting securely. May be NULL in case of non-secure connection.
Service URL, for example:
http://pride.red.iplanet.com:58080/amserver
May be NULL, in which case the naming service URL property is used.