Loyalty · Reward Instances, VIP Tiers and Product Potential Points docs corrected

Reward Instances (GET /v3/stores/{store_id}/reward_instances)

• Authenticate with X-Yotpo-Token. The Loyalty GUID and API key return 403.
• discount_type is required on the first request. For the next page, send only page_info.
• used takes true or false. Omit it to get both.

VIP Tiers (/v3/stores/{store_id}/vip_tiers/...)

• Errors use the application/problem+json format. A 404 with LOYALTY_VIP_PROGRAM_NOT_FOUND means the store isn't on the current VIP tiers experience.

Product Potential Points

• POST /v3/stores/{store_id}/customer_product_potential_points returns its result under customer_product_potential_points.
• X-Customer-Token is the SHA-256 of the customer's email followed by your Loyalty API key.
• 401 and 404 responses are now documented.