I was sending in some new event setup through the game API and received this error:

{"errorMessage":"No aggregation definition found to match event with short code: BLAHBLAH","responseCode":10}

Sure enough in the docs (https://docs.gamesparks.net/documentation/rest-api/game-rest-api) it warns of this in the Events section

Contains Event configuration data including an array of (optional) Event Attributes.  There must be a corresponding Aggregation object with the same short code as the Event.

 Huh.  So I looked and sent in an abbreviated Aggregation object that matched (with no aggregationAttributes) and all was well.

So while I guess I sorta understand that these bits are for tracking accumulative totals and such - I don't actually SEE this aggregate set up in the Configurator anywhere (I would have expected it to be under Leaderboards->Running Totals.  To add to my confusion, you don't have to set up any sort of aggregate in order to add an event in the Configurator portal manually - (and again - one doesn't appear to show up anywhere after the fact).

Any thoughts would be appreciated!!