Well it is time for part two. Part one was easy and the second part is easy as well.
Now that we got the authentication token we can get analtyics data.
The data we are getting is the accounts and profiles for analytics:

NSURL *urlAccount = [NSURL URLWithString:@"https://www.google.com/analytics/feeds/accounts/default"];

NSString* param = [NSString stringWithFormat:@"GoogleLogin auth=%@",authString]; 
NSMutableURLRequest *req = [[NSMutableURLRequest alloc] initWithURL:urlAccount];
[req setHTTPMethod:@"GET"];
[req addValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[req setValue:param forHTTPHeaderField: @"Authorization"];
[req addValue:@"Authorization" forHTTPHeaderField:param];

NSHTTPURLResponse *res;
NSError *err;
NSData *data = [NSURLConnection sendSynchronousRequest:req returningResponse:&res error:&err];

[req release];
return data;

Finally u get a NSData. I personal use libxml2 for parsing the xml data and XPath queries. Check out http://cocoawithlove.com/2008/10/using-libxml2-for-parsing-and-xpath.html for more info :)