CTXPS_Queries::add_membership_with_expiration() not working

Hi,

I am attempting to write a small plugin that scans my WP users list daily for new subscribers with a specific user meta value (member_type = ‘realtor’) and if a match if found I want to automatically add them to a previously created group called “Realtor” (group ID = 30).

My logic below seems to work fine and is able to get a list of all the right users, but then when it comes to iterating though that list and getting them added to the group, the code fails. I can’t find any specific errors in the WP Debug or PHP log.

Is there something I am missing to get your add_membership_with_expiration call to work?

function add_realtor_group_to_users() {

      $args  = array(
        'role' => 'subscriber',
        'meta_query' => array(
          array(
            'key' => 'member_type',
            'value' => 'realtor',
          ),
        )
      );

      $wp_user_query = new WP_User_Query($args);
      $realtors = $wp_user_query->get_results();

      if (!empty($realtors)) {
          foreach ($realtors as $realtor) {
            $result = CTXPS_Queries::add_membership_with_expiration($realtor->ID, 30);
          }
      }
    }

Thanks for your help!