public ApiResponse <IEnumerable <InventoryItem> > AddUpdate([FromBody] InventoryItem item)
{
item.LastUpdated = DateTime.Now;
var existing = _context.Find <InventoryItem>(new object[] { item.ProductId });
if (existing == null)
{
_context.Add(item);
}
else
{
existing.Quantity = item.Quantity;
}
_context.SaveChanges();
return(GetAll());
}