> method on a <code>ClientAuthConfig</code> or
 <code>ServerAuthConfig</code> object obtained from an AuthConfigProvider.

 <p>
 The following represents a typical sequence of calls for obtaining a client authentication context object, and then
 using it to secure a request.
 <ol>
   <li>AuthConfigProvider provider;
   <li>ClientAuthConfig config = provider.getClientAuthConfig(layer,appID,cbh);
   <li>String authContextID = config.getAuthContextID(messageInfo);
   <li>ClientAuthContext context = config.getA