def add_credit_card_eci(xml, credit_card, options)
        eci = if credit_card.is_a?(NetworkTokenizationCreditCard) && credit_card.source == :apple_pay && card_brand(credit_card) == 'discover'
                # Payeezy requires an ECI of 5 for apple pay transactions
                # See: https://support.payeezy.com/hc/en-us/articles/203730589-Ecommerce-Flag-Values
                '05'