public async Task <ActionResult> GetEventsAsync(int id)
{
var product = await _eventStoreService.Load(id);
var priceHistory = product.GetChanges()
.Where(e => e is ProductPriceUpdated)
.Select(e => (ProductPriceUpdated)e)
.Select(e => new { e.Price, e.Created });
return(Ok(priceHistory));
}