The authentication mechanism was called but the caller was <em>not</em> successfully authenticated and
 therefore the caller principal will not be made available.
 <p>
 Note that this status should be used to indicate a logical problem (such as a credential not matching or a caller
 ID that can not be found). Exceptions should be used for system level problems (such as a database connection timing out).</div>
</section>
</li>
</ul>
</section>
</li>
<!-- ============ METHOD DETAIL ========== -->
<li class="b