filter pay author stats

/* filter pay author stats */

add_filter( 'jpwt_formatted_stats', 'only_author' );

function only_author( $formatted_stats ) {
    foreach ( $formatted_stats['stats'] as $key => $stats ) {

        $user = get_userdata( $stats['author_id'] );
        if ( ! in_array( 'author', $user->roles ) ) {
            unset( $formatted_stats['stats'][ $key ] );
        }
    }
    $formatted_stats['stats'] = array_values( $formatted_stats['stats'] );
    return $formatted_stats;
}