Car-User-Role permission scratch

Car.php

<?php

class Car extends Model
{
    public function users()
    {
        return $this->belongsToMany(User::class, 'car_user_role')
            ->using(CarUserRole::class)
            ->withPivot('role_id', 'user_id', 'car_id');
    }
    
    public function drivers()
    {
        return $this->users()->wherePivot('role_id', Role::driver());
    }
}

CarPolicy.php

<?php

class CarPolicy
{
    /* $user->can('drive', $car); */
    public function drive(User $user, Car $car)
    {
        return $car->drivers->contains('id', $user->getKey());
    }
}

CarUserRole.php

<?php

class CarUserRole extends Pivot
{
    public function car()
    {
        return $this->belongsTo(Car::class);
    }
    
    public function user()
    {
        return $this->belongsTo(User::class);
    }
    
    public function role()
    {
        return $this->belongsTo(Role::class);
    }
}

Role.php

<?php

class Role extends Model
{
    public static function driver()
    {
        return static::where('name', 'driver')->firstOrFail();
    }
}

User.php

<?php

class User extends Model
{
    public function cars()
    {
        return $this->belongsToMany(Car::class, 'car_user_role')
            ->using(CarUserRole::class)
            ->withPivot('role_id', 'user_id', 'car_id');
    }
    
    public function drivenCars()
    {
        return $this->cars()->wherePivot('role_id', Role::driver());
    }
}