Updates a loyalty reward.
Call this method to update details of a reward, such as the name, whether a reward is active, or the amount of points it costs to redeem. Also call this method to add new tiers that are eligible to redeem a reward.
You may not change the type of a reward. That's set upon creation and can't be updated.
You can only call this method when authenticated as a Wix app or Wix user identity.
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.