View author’s posts

hi
View author’s posts

The following code displays posts from an author but can not display posts with 2 authors for both.

What are your suggestions to show a post to both writers?

$arg = array(
‘post_type’ => ‘track’,
‘post_status’ => $post_status,
‘author’ => $user->ID,
‘posts_per_page’ => 8,
‘display’ => $display,
‘column’ => $column,
‘more’ => ‘load-more’,
‘tpl’ => ‘templates/loop/list-music.php’
);