Save a card

cardUserKey is optional use this if you want to save multiple cards for an user

this.iyzipayService.create({
            locale: 'tr',
            conversationId: '123456789',
            externalId: 'external id',
            email: '[e-mail]',
            cardUserKey: '....',
            card: {
                cardAlias: 'john doe',
                cardNumber: '5528790000000008',
                expireYear: '2030',
                expireMonth: '12',
                cardHolderName: 'KARTIM',
            },
        })