Show list of users on the frontend

/**
* Show list of users on the frontend
* // https://wpcrumbs.com/how-to-list-users-using-wp-user-query-and-shortcodes/
**/

function show_users_lists($atts) {
    // I don't use shortcode_atts because I want to have a dynamic number of attributes
    $query = new WP_User_Query($atts);
    $results = $query->get_results();

    // no results
    if (empty($results)) {
        return;
    }

    // when we have results
    ob_start();
    echo '<ul>';
    foreach ($results as $item) {
    ?>
        <li>
            Name: <a href="<?php echo get_author_posts_url($item->ID); ?>">
                <?php echo esc_html($item->display_name); ?>
            </a>
            <br />
            <?php echo 'Email: ' . esc_html($item->user_email); ?>
            <br />
        </li>
    <?php
    }
    echo '</ul>';
    return ob_get_clean();
}

add_shortcode('user_lists', 'show_users_lists');