let revokeUrl = "https://api.linkedin.com/uas/oauth/invalidateToken"
        let request = NSURLRequest(url: NSURL(string: revokeUrl)! as URL)
        let session = URLSession(configuration: URLSessionConfiguration.default)
         let task: URLSessionDataTask = session.dataTask(with: request as URLRequest) { (data, response, error) -> Void in
            print("Res:",response!)
        }
            task.resume()
}