List of pages of a specific user

I have found how to do it.

Here is the code:

$author_query = array('posts_per_page' => '-1','author' => 1,'post_type' => 'PAGE');
$author_posts = new WP_Query($author_query);
while($author_posts->have_posts()) : $author_posts->the_post();
?>
    ■ <a href="https://wordpress.stackexchange.com/questions/318709/<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a> <br />      
<?php           
endwhile;

more information: see here