@type t() :: %Travel.Flights.Types.AirlineCredit{
  airline_iata_code: String.t() | nil,
  amount: String.t() | nil,
  amount_currency: String.t() | nil,
  code: String.t() | nil,
  created_at: String.t() | nil,
  expires_at: (String.t() | nil) | nil,
  id: String.t() | nil,
  issued_on: String.t() | nil,
  live_mode: (boolean() | nil) | nil,
  passenger_id: (String.t() | nil) | nil,
  type: atom() | nil
}