A few questions that interest me, about Laravel and with regards to MVC?

Question

Laravel

To create a user, Laravel has a ready-made User.php model, should I use it or make my own model?

I am also interested in the topic of controllers, that it is more correct to create one controller with the name UserController where to do all the functions regarding the User as createUser() , showUser() or to do each function in its own controller as RegistrationController or LoginController() or if both options are correct, then in what cases to use them, so if it’s not difficult to advise some book about Laravel (if it exists)