REST API WP CASA

Hi,
thanx for the nice plugin.
I’m trying to get specific metas from WP Casa , and store in json file.
So far I get the file stored, but I’m really stuck with the question, how to get the WP Casa post type metas….

my funcion is:
————————————–
$args = array(
‘post_type’ => ‘listing’,
‘post_status’ => ‘publish’,
‘posts_per_page’ => -1,
);

$query = new WP_Query( $args );
$posts = array();

while( $query->have_posts() ) : $query->the_post();

$posts[] = array(
‘title’ => get_the_title(),
‘excerpt’ => get_the_excerpt(),
‘author’ => get_the_author(),
‘link’ => get_permalink(),
‘listing-ID’ => get_post_meta( $post->ID, ‘_listing_id’, true ),
‘listing price’ => get_post_meta( $post->ID, ‘_price’, true ),
);

endwhile;

wp_reset_query();
———————-

the last two lines listing-ID and listing price doesn’t work, showing “false” in json file. I think, the problem is with $post->ID in get_post_meta, cause setting directly the id, f.ex. 23, everything works fine.

Maybe someone has an idea?
Thanx