@type t() :: %DeliveryMetrics.Data{
  __meta__: term(),
  auth: boolean(),
  bytes: integer(),
  channel: String.t(),
  clientip: String.t(),
  country: String.t(),
  date: DateTime.t(),
  geohash: String.t(),
  hostname: String.t(),
  location: String.t(),
  nbfiles: integer(),
  network: String.t(),
  requestid: String.t(),
  station: String.t(),
  useragent: String.t(),
  userid: integer()
}