piwigo_ynh/conf/config.inc.php

<?php

// Use HTTP authentication
$conf['apache_authentication'] = false;

// Use external authentication
$conf['external_authentification'] = true;

// how often should we check for new versions of Piwigo on piwigo.org? In
// seconds. The check is made only if there are visits on Piwigo.
// 0 to disable.
$conf['update_notify_check_period'] = 0;
?>