Kendo Grid rows not showing - kendo-grid

Question

I have a pretty basic grid using the razor wrapper and my anticipated 3 rows are not showing up.
#(Html.Kendo().Grid<ManageUserViewModel>()
.Name("grid")
.Columns(columns =>
{
columns.Bound(c => c.UserName);
columns.Bound(c => c.FirstName);
columns.Bound(c => c.LastName);
columns.Bound(c => c.Email);
columns.Bound(c => c.LastNameFirstLetter).Hidden(true);
})
.DataSource(dataSource => dataSource
.Ajax()
.Read(read => read.Action("list", "User"))
)
)
Here is the json being returned from /User/list which I ran through jsonLint to make sure it was valid.
[{"UserName":"dfeinberg","FirstName":null,"LastName":null,"Email":"daniel.feinberg#rcsg.com","Password":null,"Roles":[],"LastNameFirstLetter":""},{"UserName":"jmarley","FirstName":"Jacob","LastName":"Marley","Email":"ebuntom#gmail.com","Password":null,"Roles":[{"Id":"9a0af7ad-e38f-4300-a49e-1051dc18c8e4","Name":"Administrator","Checked":false}],"LastNameFirstLetter":"M"},{"UserName":"tcoakley","FirstName":"Tom","LastName":"Coakley","Email":"tom.coakley#redcedarsolutionsgroup.com","Password":null,"Roles":[],"LastNameFirstLetter":"C"}]

Answer 1

It is my day for dumb questions. My issue was not understanding the correct way to return the datasource from the controller. Here is my corrected controller method.
public ActionResult List([DataSourceRequest]DataSourceRequest request)
{
List<AspNetUser> users = SdContext.AspNetUser.ToList();
var models = UserAssembler.GetManageUserViewModels(users);
return Json(models.ToDataSourceResult(request));
}