Entity Framework MVVM, Insert Data into Database

Question

This question is mainly aimed for Andy ONeill, as i'm basing my code on his guide. 

I have read and understood your code best I can. From what I can tell when fetching data to display:

1. First of all create a ProductVM, this creates an instance of the Product Class and sets up the metadata for validation ect.
2. Then each ProductVM is added to an ObservableCollection which is binded to. 

This makes sense, however I want to Insert some data, you have the starting for that but seems you never finished it, could you tell me if i'm wrong here:

1. Bind to a list of commands, these CommandMessages are sent to the CrudVMBase where the method is defined.
2. In this case InsertNew() is used, this method then initializes a new ProductVM.
3. This then gets passed to EditVM which passes the Product Class instance to editEntity within CrudVMBase.

This is where i'm getting kind of lost, could you explain a bit more on where it goes from there. 

Also, how would I go about putting my data in an instance (in my case) user class? I originally binded to some properties in an instance of a class, however i'm not sure this is the correct way now. Some of the properties are filled in using code, not the user. 

Of course I would have to send the password using the command parameter as well as you can't bind to it. Below is the code I currently have, but I believe this is wrong.

public class Register : NotifyUIBase
    {

        public string ClearPassword { get; set; }
        public string Salt { get; set; } //Auto - Generated using code
        public DateTime DateCreated { get; set; } //Auto - Todays date
        public Visibility Result { get; set; } //Auto - Changed if there are no errors

        public RelayCommand RegisterCommand { get; set; }
        public Register()
        {
            Result = Visibility.Hidden;
            RegisterCommand = new RelayCommand(RegisterExecute);
        }
        private void RegisterExecute()
        {
            Salt = Common.Security.KeyGenerator.GetUniqueKey(64);
            DateCreated = DateTime.Now;

        }
    }

Edit:

Looking more into the code I see that the Commands you define on MainWindowViewModel are pretty vital in their setup. Due to my Views having many different Buttons which will need different commands, and not always being Menu Bar style, how could I setup a button on it's own without using a List? Could I just do the following and have the button Bind to it?

public CommandVM RegisterCommandButton { get; set; } = new CommandVM { CommandDisplay = "Register", IconGeometry = App.Current.Resources["InsertIcon"] as Geometry, Message = new CommandMessage { Command = CommandType.Insert } };