code: public Person getInfo(String userId, boolean sign) throws JinxException {
      JinxUtils.validateParams(userId);
      Map<String, String> params = new TreeMap<>();
      params.put("method", "flickr.people.getInfo");
      params.put("user_id", userId);
      return jinx.flickrGet(params, Person.class, sign);
    }
docs: Get information about a user.
  <br>
  This method does not require authentication.
  
  @param userId (Required) The user id of the user to fetch information about.
  @param sign   if true, the request will be signed.
  @return object with information about the user.
  @throws JinxException if required parameters are missing, or if there are any errors.
  @see <a href="https://www.flickr.com/services/api/flickr.people.getInfo.html">flickr.people.getInfo</a>