<s>[INST] I'm working on a project that requires our users to log in to our application before accessing its full feature set. So I've created a very basic log-in view, but currently any username and password will work, which isn't ideal.

I'm trying to simulate many different user types with my application, and I'm looking for a way to easily add, remove, and verify these users using a database that's simple to set up and use. I'd like this database to be local to the machine the application is running on. 

Can you suggest any libraries or methods that could help me for this purpose?[/INST]