         
         DispatchQueue.global(qos:DispatchQoS.QoSClass.background).async
         {
-            URLSession.shared.dataTask(
+            let dataTask:URLSessionDataTask = URLSession.shared.dataTask(
                 with:pictureUrl)
             { (data, response, error) in
                 

                    self?.imageView.image = image
                }
            }
        }
    }
}

        imageView.layer.cornerRadius = kImageViewHeight / 2.0
        imageView.layer.borderColor = UIColor.black.cgColor
        imageView.layer.borderWidth = 1
        self.imageView = imageView
        
        addSubview(userName)
        addSubview(imageView)
