/**
  * Returns the attached API's user purchased subscriptions
  * For more information see: https://www.egopay.com/developers/api
  * Since v1.3
  * @param array $aParams
  * @return mixed
  */
 public function getPurchasedSubscriptions($aParams = array())
 {
     $this->_setupCredentials($aParams);
     $oPurchasedSubscriptions = $this->_oClient->purchasedSubscriptions($aParams);
     $this->_checkError($oPurchasedSubscriptions);
     return $oPurchasedSubscriptions;
 }