public static function createNonce($action)
 {
     $time = owa_coreAPI::getNonceTimeInterval();
     $cu = owa_coreAPI::getCurrentUser();
     $user_id = $cu->getUserData('user_id');
     $full_nonce = $time . $action . $user_id . 'owa_nonce';
     $nonce = substr(owa_coreAPI::saltedHash($full_nonce, 'nonce'), -12, 10);
     return $nonce;
 }