egistered AuthConfigProvider from the factory.

 Get the provider of ServerAuthConfig and ClientAuthConfig objects registered for the identified message layer and
 application context.

 <p>
 All factories shall employ the following precedence rules to select the registered AuthConfigProvider that matches
 the layer and appContext arguments:
 <ul>
 <li>The provider specifically registered for the values passed as the layer and appContext arguments shall be
 selected.
 <li>If no provider is selected accordin