swift - Getting PFUser's username (Parse.com) -

i trying username of pfuser. code below works without line:var username = nameid.username string when added collection view not show results. ideas?

var query = pfquery(classname:"chat")     //        query.wherekey("user", equalto:currentuser)     query.wherekey("rideid", equalto:currentobjectid)     query.orderbyascending("createdat")      query.findobjectsinbackgroundwithblock {         (objects: [anyobject]!, error: nserror!) -> void in         if error == nil {             // find succeeded.             nslog("successfully retrieved \(objects.count) scores.")             // found objects             object in objects {                 nslog("%@", object.objectid)                  var testid = object.objectid                  println(testid)                  self.orderedidarray.append(testid)                  var message = object.objectforkey("message") string                 self.messagestring = message                 self.messagearray.append(self.messagestring)                 println(message)                  var nameid = object.objectforkey("user") pfuser                 var username = nameid.username string                 self.namestring = username                 self.namesarray.append(self.namestring)                  self.collectionview?.reloaddata()              }          } else {             // log details of failure             nslog("error: %@ %@", error, error.userinfo!)         }      } 

it working line:

query.includekey("user")