func testExample() {

    let urlString = "https://api.ipify.org/"
    guard let url = URL(string: urlString) else { return }

    URLSession.shared.dataTask(with: url) { (data, response, error) in
        if error != nil {
            print(error!.localizedDescription)
        }

        guard let data = data
            else {
                print("error found in data")
                return
        }

        print("*******")
        let outputStr  = String(data: data, encoding: String.Encoding.utf8) as String!
        print (outputStr)

        }.resume()

}