Risk labels describing the card being assessed, such as its
funding mechanism.
Values:
CARD_LABEL_UNSPECIFIED (0):
No label specified.
PREPAID (1):
This card has been detected as prepaid.
VIRTUAL (2):
This card has been detected as virtual, such
as a card number generated for a single
transaction or merchant.
UNEXPECTED_LOCATION (3):
This card has been detected as being used in
an unexpected geographic location.
