Token PreAuth

    func repeatPreAuthOperation() {
        if let cardDetails = self.cardDetails, let payToken = self.paymentToken, let ref = Reference(consumerRef: self.reference) {
            try! self.judoKitSession.invokeTokenPreAuth(judoId, amount: Amount(decimalNumber: 0.01, currency: currentCurrency), reference: ref, cardDetails: cardDetails, paymentToken: payToken, completion: { (response, error) -> () in
                self.dismiss(animated: true, completion: nil)
                if let error = error {
                    if error.code == .userDidCancel {
                        self.dismiss(animated: true, completion: nil)
                        return
                    }
                    var errorTitle = "Error"
                    if let errorCategory = error.category {
                        errorTitle = errorCategory.stringValue()
                    }
                    self.alertController = UIAlertController(title: errorTitle, message: error.message, preferredStyle: .alert)
                    self.alertController!.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
                    self.dismiss(animated: true, completion:nil)
                    return // BAIL
                }
                if let resp = response, let transactionData = resp.items.first {
                    self.cardDetails = transactionData.cardDetails
                    self.paymentToken = transactionData.paymentToken()
                }
                let sb = UIStoryboard(name: "Main", bundle: nil)
                let viewController = sb.instantiateViewController(withIdentifier: "detailviewcontroller") as! DetailViewController
                viewController.response = response
                self.navigationController?.pushViewController(viewController, animated: true)
                })
        } else {
            let alert = UIAlertController(title: "Error", message: "you need to create a card token before making a repeat payment or preauth operation", preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
            self.present(alert, animated: true, completion: nil)
        }
    }

Note: Please make sure that the Consumer Reference used and the card token matches the ones used when the card token was originally generated.