Toptal – authors

// WP_Query arguments
$args = array(
	'post_type'              => array( 'authors' ),
	'meta_query'             => array(
		array(
			'key'     => 'cf_mb_author',
			'value'   => 'get_the_author_meta( 'ID' )',
			'compare' => '=',
		),
	),
);

// The Query
$query = new WP_Query( $args );