@type t() :: %ExOura.Client.PublicSleepTime{
  day: String.t(),
  id: String.t(),
  meta: ExOura.Client.Metadata.t(),
  optimal_bedtime: ExOura.Client.PublicSleepTimeWindow.t() | nil,
  recommendation: String.t() | nil,
  status: String.t() | nil
}