How to implement project architecture with 3 user roles in laravel?

Question

Laravel

There are roles: user, administrator, site owner.
How to implement the logic correctly, breaking it down by roles and each user will be entered into the users table where there will be a role field or create 3 different models for each type of user (3 tables in the database, respectively).
User: can add/modify his posts.
Administrator: message moderation.
Site owner: higher level of rights (adding, deleting messages).

Answer 1

https://www.google.ru/search?q=laravel+rbac
or
https://laravel.com/docs/5.4/authorization#gates

Answer 2

If you have only three roles, and they intersect in functionality (it is enough for the user to be in one of them to make it clear what he can do) - of course role in User.
If there are many roles and each gives a small set of permissions, and the total permission field is collected from their summation, then, of course, there must be a User connection with several Roles. Or, if you want to go deeper into hell^W^W^W, assign multiple Permissions to each Role to control exactly what each role can do and change while the site is running.