docs: public void create(String care, String openId, String text) {
          String url = WxEndpoint.get("url.care.session.create");
          Map<String, String> request = new HashMap<>();
          request.put("kf_account", care);
          request.put("openid", openId);
          if(!(text == null || "".equals(text))) {
              request.put("text", text);
          }
  
          String json = JsonMapper.nonEmptyMapper().toJson(request);
          logger.debug("create session: {}", json);
          wxClient.post(url, json);
      }