Can anyone help me, please?

Sentry may be an overkill for your case, but if you think it may come useful in the future and you have time to study it, this could actually be a good opportunity to integrate it.

Otherwise you could just add some sort of role field to users table and check it in a custom middleware assigned to controllers/routes you want to restrict access to.

Ok, thank you. There is online an example in which I can see how to extend a model and use Eloquent?

I would suggest you watch Laravel 5 Fundamentals series.

Yes, I'm learning with this series, and I have see the first half of lessons, but I've not found anything about.