@spec cancel(
  Inttegro.Client.t(),
  Inttegro.Schedules.CancelScheduleRequest.t(),
  keyword()
) ::
  {:ok, Inttegro.Schedules.ScheduleCancelDetail.t()} | {:error, Exception.t()}

@spec lookup(
  Inttegro.Client.t(),
  Inttegro.Schedules.LookupScheduleRequest.t(),
  keyword()
) ::
  {:ok, Inttegro.Schedules.ScheduleDetail.t()} | {:error, Exception.t()}