 of the service response, or null. It may be used by the
 method implementation to retrieve Principals and credentials necessary to secure the response. If the Subject is not
 null, the method implementation may add additional Principals or credentials (pertaining to the source of the service
 response) to the Subject.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>An AuthStatus object representing the completion status of the processing performed by the method. The
 AuthStatus values that may 