post https://api.nortridgehosting.com/29.1/loans//payment-gateway/credit-cards
Adds a Credit Card to a Loan and Returns the created Credit Card
CardType: U= Unknown, D = Debit, C = Credit, P = Prepaid Debit
BrandType: U = Unknown, A = Amex, M = Master Card, V = VISA, D = Discover
EntryType: U= Unknown, K = Keyed, S = Swipe, T = Tap, I = Insert
Supports Web User Access Token