code: public UserListResult getUserList(int start, int count)
              throws APIConnectionException, APIRequestException {
          return _userClient.getUserList(start, count);
      }
docs: Get user list
  @param start The start index of the list
  @param count The number that how many you want to get from list
  @return User info list
  @throws APIConnectionException connect exception
  @throws APIRequestException request exception