code: public CreateDepartmentResponse create(QYDepartment department) {
          BeanUtil.requireNonNull(department, "department is null");
          CreateDepartmentResponse response;
          String url = BASE_API_URL + "cgi-bin/department/create?access_token=#";
          BaseResponse r = executePost(url, department.toJsonString());
          String resultJson = isSuccess(r.getErrcode()) ? r.getErrmsg() : r.toJsonString();
          response = JSONUtil.toBean(resultJson, CreateDepartmentResponse.class);
          return response;
      }
docs: 创建部门
  @param department 部门信息
  @return 部门信息