Restricting Display Posts shortcode posts to only show posts by Authors with specific WooCommerce Subscription

display-posts-by-author-subscription-level.php

<?php 
// This is dependant on Display Posts Shortcode plugin - https://wordpress.org/plugins/display-posts-shortcode/
// Alst dependant on WooCommerce Subscriptions Plugin - https://woocommerce.com/products/woocommerce-subscriptions/

// Adding the Author Subscription Level filter to Display Posts shortcode
function be_display_posts_shortcode_exclude_posts( $args, $atts ) {
  if( isset( $atts['platinum'] ) ) {
    $blogusers = get_users(); // get all users
    $platinumUsers = array(); 
  
  // Loop through users  
    foreach ( $blogusers as $user ) {
    
    // testing if user has a specific subscription
      if(wcs_user_has_subscription( $user->ID, 167, '' )){
    
    // if they have the subscription, add them to the array
      $platinumUsers[] = $user->ID;
      } 
    }
    // shows posts only if author is in the new array
    $args['author__in'] = $platinumUsers;
  }
    
  return $args;
}
add_filter( 'display_posts_shortcode_args', 'be_display_posts_shortcode_exclude_posts', 10, 2 );
?>