help with free tutorial "Build a CMS With Laravel"

Hi, i am a complete beginner and i am trying to create a little CSM using the Build a CMS With Laravel

Im using LAMP (ubuntu 18.04) and i cannot seem to find out which version of Laravel is used in this tutorial. i was using laravel 5 but it seems that auth implementation has changed and the way of implementation as it is described in the tutorial does not work for me. Can anyone plase help?

OK, it seems i have some progress now. Currently i am stuck on lesson 4.1 After i implement everything in edit.blade.php i get this fatal error:
Argument 1 passed to Illuminate\Database\Query\Builder::cleanBindings() must be of the type array, string given, called in /var/www/html/zavrsni/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php on line 908 (View: /var/www/html/zavrsni/resources/views/admin/users/edit.blade.php)

it also points to user.php to this function:
public function hasRole($role) {
return null !== $this->roles()->whereIn(‘name’, $role)->first();

@jasonclewis can you maybe help please?