title: Intuit API throwing "Required parameter ExpenseAccountRef or IncomeAccountRef is missing in the request" for non inventory item
body: <p>I am attempting to create an item on QuickBooks Online using Intuits IPP SDK V3.0 for ASP.net. I have set the only parameter to the Intuit.Ipp.Data.Item() to be a name and am receiving a validation error stating "Required parameter ExpenseAccountRef or IncomeAccountRef is missing in the request" I have even specified that it is not an inventory item by setting item.TypeSpecified = false; but still get the error response.</p>
  
  <pre><code>var success=true;
  try{
     var item = new Intuit.Ipp.Data.Item();
     item.Name = thisItem.name;
     item.TypeSpecified = false;
     var resultItem = service.Add(item) as Intuit.Ipp.Data.Item;
  }
  catch (Exception e)
  {
     var problem = e.ToString();
     success = false;
  }
  </code></pre>