This API primarily validates and applies a coupon to a cart
link to live heroku * Doesn't work any more
/api/{type}
route to Fetch Collections of objects from DB
/api/cart/{userId}
Cart routes
/api/cart/{userId}/{task}
routes for operations on cart
/api/coupon/{id}
route for a coupon
/api/validate/{userId}/{couponId}
validates a coupon for a cart
/api/apply/{userId}/{couponId}
gives the changes for a cart on a particular coupon