get https://api.criteo.com/legacy/offsite-ads/advertisers//ad-preview
Get a preview of an HTML ad with products belonging to the provided seller
� advertiserId: Valid COA advertiserId, seller belongs to provided advertiser
� sellerId: Products from given SellerId will fill the ad preview, must be existing COA sellerId
� height: height may be supplied to request a specific ad preview height. Default height: 250
� width: width may be supplied to request a specific ad preview width. Default width: 300
Ad preview api calls are capped to 1000 per day per advertiser by default. Current usage, limit, and period can be found using v2/offsite-ads/advertisers/preview-limit