@type t() :: %ExOura.Client.PublicReadinessContributors{
  activity_balance: integer() | nil,
  body_temperature: integer() | nil,
  hrv_balance: integer() | nil,
  previous_day_activity: integer() | nil,
  previous_night: integer() | nil,
  recovery_index: integer() | nil,
  resting_heart_rate: integer() | nil,
  sleep_balance: integer() | nil,
  sleep_regularity: integer() | nil
}