his provider.

 <p>
 The implementation of this method returns a ClientAuthConfig instance that describes the configuration of
 ClientAuthModules at a given message layer, and for use in an identified application context.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>layer</code> - A String identifying the message layer for the returned ClientAuthConfig object. This argument must not
 be null.</dd>
<dd><code>appContext</code> - A String that identifies the messaging context for the returned Client