Sitemap.xml et authentification

<?php 

header("Content-type: text/xml");
echo '<?xml version="1.0" encoding="UTF-8" ?>';

?>
<urlset xmlns="https://www.google.com/schemas/sitemap/0.84/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://www.google.com/schemas/sitemap/0.84/ https://developers.google.com/search/docs/advanced/sitemaps/overview?visit_id=637426753906612022-3274136977&rd=1">

    <?php

    $entries = mysql_query("SELECT * FROM user");
    while($row = mysql_fetch_assoc($entries)) {
    $url= stripslashes($row['url']);
    $date = date("Y-m-d", strtotime($row['timestamp']));

    echo "

    <url>
        <loc>".$title."</loc>
        <lastmod>".$date."</lastmod>
        <changefreq>never</changefreq>
        <priority>0.8</priority>
    </url>";

 } ?>

</urlset>