CreditCard module defines the struct for the credit cards.

It mostly has such as:-

• number: Credit card number
• month: Expiry month
• year: Expiration year
• first_name: First name of the card holder
• last_name: Last of the card holder
• verification_code: 3/4 digit code at the back of the card
• brand: VISA/MASTERCARD/MAESTRO/RUPAY etc.