Why I can't add Discover Card ?

[AdrianBR]

Hey guys, I've being trying to add my Discover credit card (issued by citibank/Diners Club)

but there is no option to selec this type of card, my screen - as showed above only has: Visa, Mastercard, American, and three others...

What should I do?

[DPCreations]

Seems obvious.  Use one of the credit cards which are accepted.  You can't use a card brand which is not accepted.