The implementation on the CallbackHandlerInterface. This class only supports
PasswordValidationCallback
Parameters: callbacks - - array of Callbacks to be handled. throws: java.io.IOException - - if an input or output error occurs. throws: UnsupportedCallbackException - - if the implementation of this methoddoes not support one or more of the Callbacks specified in the callbacksparameter.
Initialize the authenticator with the UserDomain.
Parameters: domain - is the UserDomain which has the Authentication Context. throws: IllegalStateException - if initialization fails.