hello!

is it possible to filter the author’s name exibition by category ‘author’ only? – in the snippet below
i have also editors, and don’t want them being displayed.

<?php if (function_exists('publishpress_authors_get_post_authors')) { 
$post_id = get_the_ID(); 
$post_authors = publishpress_authors_get_post_authors($post_id); 
foreach ($post_authors as $post_author) { 
$first_name = $post_author->first_name; 
$last_name = $post_author->last_name; 
echo "$last_name, $first_name "; 
} 
} 
?>

i have multiople authors. the result expected should be as using the shortcode:
[publishpress_authors_box author_categories=”autor”]

but i do need it to be shown as in the snippet above, meaning:
css customizable ‘last name’ first;
then ‘first name’

thank you!