Promotion

Number of APIs: 6

1. create promotion POST {{BASE_URL}}/v1/checkout/promotion

2. fetch promotions GET {{BASE_URL}}/v1/checkout/promotions

3. fetch a promotion GET {{BASE_URL}}/v1/checkout/promotions/:id

4. update promotion PUT {{BASE_URL}}/v1/checkout/promotion

5. pause promotion POST {{BASE_URL}}/v1/checkout/promotion/pause

6. end promotion POST {{BASE_URL}}/v1/checkout/promotion/end