 be used to validate the request. If the Subject
 is not null, the method implementation may add additional Principals or credentials (pertaining to the recipient of
 the service request) 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 be returned by this method are defined as follows:

 <ul>
   <li>AuthStatus.SUCCESS when the application request mess