Is it an option to create the users in the Membership system? That would be the quickest and safest way to do i. Building your own login system has risks involved, that are typically already covered with the built-in Membership system.
You can create a user using the Membership API like this:
Thanks you so much for providing such a simple, understandable books which is really motivating even people who are no very interested with IT specially programming or web development...
You're welcome. Good to hear you like the book so much.