public function update_subscription($listMailChimpID, $subStatus)
 {
     $Lists = new PerchMailChimp_Lists($this->api);
     $List = $Lists->get_one_by('listMailChimpID', $listMailChimpID);
     if (!is_object($List)) {
         return false;
     }
     $Subscriptions = new PerchMailChimp_Subscriptions($this->api);
     $Subscription = $Subscriptions->find_subscription($List, $this);
     if (is_object($Subscription)) {
         $Subscription->update(['subStatus' => $subStatus, 'subUpdated' => date('Y-m-d H:i:s')]);
         return true;
     }
     return false;
 }