User.php

<?php

namespace App;

use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;

use App\Role;

class User extends Authenticatable
{
    use Notifiable;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'email', 'password', 'role_id',
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];

    public function role()
    {
        return $this->belongsTo(Role::class);
    }

    /**
     * @param string|array $roles
     */
    public function authorizeRoles($roles)
    {
        if (is_array($roles)) {
            return $this->hasAnyRole($roles) || abort(401, 'This action is unauthorized.');
        }

        return $this->hasRole($roles) || abort(401, 'This action is unauthorized.');
    }

    /**
     * Check multiple roles
     * @param array $roles
     */
    public function hasAnyRole($roles)
    {
        return in_array($this->role->name, $roles);
    }

    /**
     * Check one role
     * @param string $role
     */
    public function hasRole($role)
    {
        return $this->role->name === $role;
    }

    public function isSuperAdmin()
    {
        return $this->role->name === 'superadmin';
    }
}