class AddAccount: UIViewController {
    let DataContext= (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext

    @IBAction func addAccount(_ sender: UIBarButtonItem) {
            let newAccount = Account(context: DataContext)
            newAccount.name = nameuser.text
            newAccount.username= username.text
            newAccount.password= password.text

            (UIApplication.shared.delegate as! AppDelegate).saveContext()
    }
}