nbulaj/alpha_card

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lib/alpha_card/data/cvv_responses.yml

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"M": 'CVV2/CVC2 match'
"N": 'CVV2/CVC2 no match'
"P": 'Not processed'
"S": 'Merchant has indicated that CVV2/CVC2 is not present on card'
"U": 'Issuer is not certified and/or has not provided Visa encryption keys'