Create, Edit, Delete CRM Account using ASP.NET MVC

Hi all,

https://community.dynamics.com/crm/b/scaleablesolutionsblog/archive/2016/01/04/connecting-asp-net-mvc-application-to-dynamic-crm

Link above show how to connect ASP.NET MVC and Dynamics CRM.

I followed that tutorial but i cannot create new account or delete or edit that account ?

If you have solution how to do it, please guide me !

Thanks very much.