/**
* remove certificate upload field, if a certificate already exists
* @param $dc
*/
public function onCertificateUpload($dc)
{
$authServer = \AuthClientServerModel::findByID(\Input::get('id'));
if ($authServer->server_key != '') {
unset($GLOBALS['TL_DCA']['tl_authclient_server']['fields']['server_key']);
}
}
