code: public function getUserCards($openid, $cardId = '')
      {
          $params = [
              'openid' => $openid,
              'card_id' => $cardId,
          ];
  
          return $this->parseJSON('json', [self::API_GET_CARD_LIST, $params]);
      }
docs: 获取用户已领取卡券接口.
  
  @param string $openid
  @param string $cardId
  
  @return \EasyWeChat\Support\Collection