@type t() :: %Ramp.Cashbacks.Cashback{
  amount: Ramp.Money.t(),
  created_at: DateTime.t() | nil,
  id: String.t(),
  period_end: DateTime.t() | nil,
  period_start: DateTime.t() | nil,
  state: String.t() | nil,
  sync_status: String.t() | nil
}