Can someone who understands Flickrj help me with authentication? I'm trying to find photos of seattle with a geo script I've loosely compiled from:

http://www.bryanchung.net/?p=189


This is what I have so far. I don't understand how to authenticate with 'read permission' either with or without Flickrj


import com.aetrion.flickr.auth.*;
import proxml.*;

String userName = "YOUR_USER_NAME";
String apiKey = "YOUR_API_KEY";
String nsid = "";
String url = "http://api.flickr.com/services/rest/";
XMLInOut xml = null;

Flickr f;
AuthInterface a;

void setup() {
 size(600,600);
 background(0);
 frameRate(15);
 xml = new XMLInOut(this);
 f= new Flickr(apiKey);
 a = f.getAuthInterface();
}

void draw() {
}

void mousePressed() {
 nsid = "";
 findByUsername(userName);
}

void findByUsername(String _n) {
 String rest = url+"?method=flickr.people.findByUsername";
 rest += "&api_key=" + apiKey;
 rest += "&username=" + _n;
 xml.loadElement(rest);
}

void getFrob(String _n) {
 String rest = url+"?method=flickr.auth.getFrob"


void getPublicPhotos(String _n) {
 String rest = url+"?method=flickr.photos.geo.photosForLocation";
 rest += "&api_key=" + apiKey;
 rest += "&user_id=" + nsid;
 rest += "&lat=47";
 rest += "&lon=122";
 xml.loadElement(rest);
}

void xmlEvent(proxml.XMLElement _x) {
 parseXML(_x);
}

void parseXML(proxml.XMLElement _x) {
 String stat = _x.getAttribute("stat");
 if (!stat.equals("ok")) {
   println("Error from Flickr");
   return;
 }
 proxml.XMLElement node = _x.getChild(0);
 String type = node.getName();
 if (type.equals("user")) {
   nsid = node.getAttribute("nsid");
   println(nsid);
   getPublicPhotos(nsid);
 }
 else if (type.equals("photos")) {
   int num = node.countChildren();
   println(num);
   getPhotos(node);
 }
}

void getPhotos(proxml.XMLElement _n) {
 int cnt = _n.countChildren();
 cnt = min(cnt,64);
 for (int i=0;i<cnt;i++) {
   proxml.XMLElement ph = _n.getChild(i);
   String fm = ph.getAttribute("farm");
   String sv = ph.getAttribute("server");
   String id  = ph.getAttribute("id");
   String sc = ph.getAttribute("secret");
   String imgURL = "http://farm"+fm+".static.flickr.com/"+
     sv + "/" + id + "_" + sc + "_s.jpg";
   PImage img = loadImage(imgURL);
   int x = (i%8) * img.width;
   int y = (i/8) * img.height;
   image(img,x,y);
 }
}