Credit
data class CreditCardMeta(var guid: String, var timeCreated: Long, var timeLastUsed: Long?, var timeLastModified: Long, var timesUsed: Long, var syncChangeCounter: Long)
Metadata fields managed internally by the library: the guid, timestamps and local sync state. These are automatically set on add_credit_card and updated on operations like touch and update_credit_card. Not included in UpdatableCreditCardFields; use add_credit_card_with_meta when importing records that already have metadata.