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<h4>logout</h4>
<pre>void&nbsp;logout()
     throws <a href="../../../jakarta/servlet/ServletException.html" title="class in jakarta.servlet">ServletException</a></pre>
<div class="block">Establish <code>null</code> as the value returned when <code>getUserPrincipal</code>, <code>getRemoteUser</code>, and
 <code>getAuthType</code> is called on the request.</div>
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<dt><span class="throwsLabel">Throws:</span></dt>
<