post https://{siteId}.a.searchspring.io/api/personalization/preflightCache
If your account is configured to utilize Personalized Search & Merchandising, this endpoint is required to feed into the feature. In the integration, the moment the data points for "shopper", "cart", or "lastViewed" query string parameters are assigned a value, a Preflight request will need to be sent before a request to the Autocomplete or Search API endpoint is sent. The POST method will support more than 2048, if there are less characters use the GET method.