UITextContentType creditCardNumber is not working

We attempted to set the contentType of UITextField to suggest hint about the added credit card number. Following code has been used :-

    txtField.returnKeyType = .done

    txtField.placeholder = "Credit Card Number"

    txtField.borderStyle = .roundedRect

    txtField.keyboardType = .default

    txtField.textContentType = .creditCardNumber

We are not getting the expected suggestions about credit card no.

We have added one credit card in Account’s Payment & Shipping section.

Please help if I am missing something here.