post https://a.klaviyo.com/api/coupon-code-bulk-create-jobs
Create a coupon-code-bulk-create-job to bulk create a list of coupon codes.
Max number of coupon codes per job we allow for is 1000.
Max number of jobs queued at once we allow for is 100.
Rate limits:
Burst: 75/s
Steady: 700/m
Scopes:
coupon-codes:write