Hi guys! So, this might be one of the easiest engines I've ever done, and that is ON PURPOSE. Simple engines are very easy to customize, and this can have LOTS of customizing. However, because it is very simple, it isn't very secure. You can change that as long as you stick with the general coding! Just backpack the single strip of coding in the project and fill in any ______s with the name of your project. Once someone creates an account, their username and password will be recorded! As long as their username and password are recorded when they log in, they will be able to access the program. You can add limits to username/password characters they can use, create a fool-proof way to store passwords and/or usernames so they have to match, and even make it so that they can't log into someone else's account! The possibilities are endless!
Please give credit when using. :)