<ul>
<?php if ( !emptyempty( $users ) ) : ?>
    <?php foreach ( $users as $id ) : ?>
        <li class="user-entry">
            <figure><?php echo get_avatar( get_the_author_meta('email', $id), '40' ); ?></figure>
            <h4 class="user-title"><a href="<?php echo esc_url( get_author_posts_url( $id ) ); ?>"><?php the_author_meta( 'display_name', $id ); ?></a></h4>
        </li>
    <?php endforeach; ?>
<?php endif; ?>
</ul>