use Friendica\Core\PConfig;
use Friendica\Core\Renderer;
use Friendica\Core\System;
-use Friendica\Database\DBA;
use Friendica\Protocol\Email;
-use Friendica\Util\DateTimeFormat;
-use Friendica\Util\Security;
use Friendica\Util\Strings;
function invite_post(App $a)