post https://api.nbx-stage-westeurope.nitrobox.io/v2/billing/configuration/aggregation
Create a new aggregation configuration. Aggregation configurations are an additional post processing to sum up the item amounts by certain criterias. For example BY_TAX_RATE would sum up the values of the items (rowTotalExclusiveVat, rowTotalInclusiveVat, ...) grouped by the tax rates of the items. Only one configuration per invoiceType is possible.