@type t() :: %Merchant.JourneyLog{
  airline_code: String.t() | nil,
  airline_name: String.t() | nil,
  arrival_airport_code: String.t() | nil,
  departure_airport_code: String.t() | nil,
  fare_base_code: (String.t() | nil) | nil,
  flight_number: (String.t() | nil) | nil,
  sequence: integer() | nil,
  travel_date: DateTime.t() | nil
}