Updates a loyalty reward.
Use this endpoint to update details of a reward, such as the name, whether or not a reward is active, or the amount of points it costs to redeem. Also use this endpoint to add new tiers that are eligible to redeem a reward.
You may not change the タイプ of a reward. That is set upon creation and cannot be updated.
You can only call this method when authenticated as a Wix app or Wix user identity.