post https://vanilla-dev02-loyalty.fabric.zone/api/v1/redeem/member-reward
Confirms the redemption and marks the reward as used. This is done based on the redemptionCode that is generated from the response of the 'Issue Variable Rewards' - POST /api/v1/redeem/reward/issue endpoint.
Note:
1) Rewards have to be issued before they can be redeemed.
2) Rewards must be within their expiration date.