ProcessOut.Setup(projectId: "your_project_id")

ProcessOut.Tokenize(card: card, metadata: [:], completion: {(token, error) -> Void in
    if error != nil {
        switch error! {
        case .BadRequest(let message, let errorCode):
            // developers, message can help you
            print(message, errorCode)
        case .InternalError:
            print("An internal error occured")
        case .MissingProjectId:
            print("Check your app delegate file")
        case .NetworkError:
            print("Request could not go through")
        }
    } else {
        // send token to your backend to charge the customer
        print(token!)
    }
})

ProcessOut.UpdateCvc(cardId: "a_card_token", newCvc: "123", completion: { (error) in
    if error != nil {
        // an error occured
        print(error!)
    } else {
        // card CVC updated
    }
})