docs: public int count(List<String> statusList) {
          Map<String, Object> request = new HashMap<>();
          request.put("offset", 0);
          request.put("count", 1);
          if (statusList != null && !statusList.isEmpty()) {
              request.put("status_list", statusList);
          }
  
          String url = WxEndpoint.get("url.card.list");
          String json = JsonMapper.defaultMapper().toJson(request);
          String response = wxClient.post(url, json);
  
          Map<String, Object> result = JsonMapper.defaultMapper().json2Map(response);
          if (result.containsKey("total_num")) {
              return (Integer) result.get("total_num");
          } else {
              throw new WxRuntimeException(999, "create card failed.");
          }
      }