@type t() :: %Rapyd.Types.Invoice{
  amount: float(),
  created_at: integer(),
  currency: String.t(),
  customer: String.t(),
  due_date: integer() | nil,
  id: String.t(),
  lines: map() | nil,
  metadata: map() | nil,
  paid_at: integer() | nil,
  payment: String.t() | nil,
  status: String.t(),
  subscription: String.t() | nil
}