@IBAction func pay(_ sender: Any) {

    let urlString:String = "https://website.com/video.php?user=(user)&pass=(pass)&texto=(texto)&esp=(espec)&l_origen=(l_origen)&l_destino=(l_destino)"


    let svc = SFSafariViewController(url: NSURL(string: urlString)! as URL)
        self.present(svc, animated: true, completion: nil)
}