I am trying to follow a few tutorials on how to do this but I am coming out with no results.

I have to use two models in my view and they're both retrieving data from the database but when I try to combine them into one view it says I'm getting a null result. How can I query from the database and return both models to the view?

User.cs

public class User
{
    [Key]
    public int UserID { get; set; }
    public string UserName { get; set; }
    public string UserPassword { get; set; }
}

Course.cs

public class Course
{
    [Key]
    public int CourseID { get; set; }
    public string CourseName { get; set; }
    public string CourseDescription { get; set; }
}

CommonViewModel

public class CommonViewModel
{
    public List<User> users { get; set; }
    public List<Course> courses { get; set; }
}

DefaultConnection.cs

    public class DefaultConnection : DbContext
    {
        public DefaultConnection() : base("DefaultConnection") { }

        public DbSet<User> Users { get; set; }
        public DbSet<Course> Vehicles { get; set; }
    }

View

@model TEST.Models.CommonViewModel

@foreach (var item in Model.users)
{
    @Html.DisplayFor(modelItem => item.UserID)
}

HomeController

private DefaultConnection db = new DefaultConnection();

       public ActionResult Index()
        {
            List<User> users = new List<User>();

            List<Course> courses = new List<Course>();

            var viewModel = new CommonViewModel();
            viewModel.users = users;
            viewModel.courses = courses;

            return View(viewModel);
        }