post https://a.klaviyo.com/api/catalog-variants/
Create a new variant for a related catalog item.
Rate limits:
Burst: 75/s
Steady: 700/m
Scopes:
catalogs:write
Create a new variant for a related catalog item.
Rate limits:
Burst: 75/s
Steady: 700/m
Scopes:
catalogs:write