get
https://api.sandbox.cleeng.com/3.1/entitlements
You can use this endpoint to list a customer's entitlements and calculate a subscription's length. You can fetch entitlements for two types of offer: subscriptions and passes only. (For more information on offers, see What is a Cleeng offer?).
If there are two or more subscriptions or passes for the same offer and the same customer, there will be as many entitlements returned as there are subscriptions / passes.