Call to undefined method Illuminate\Database\Query\Builder::attachPermission()

[kirkdm]

I'm using laravel 5.5.4 the latest version I think. I'm getting this error in my seeder it says.

In Builder.php line 2483:

Call to undefined method Illuminate\Database\Query\Builder::attachPermissions()

This is my code in my seeder and below that is my User model - note that if I take away the notifiable trait in the user model it still get the same error.

`<?php

use Illuminate\Database\Seeder; use App\User; use App\Permission;

class UsersTableSeeder extends Seeder { /**

• Run the database seeds.

• @return void */ public function run() { //

  $admin = new User;
  $admin->name = "Jon Doe";
  $admin->password = bcrypt('pass');
  $admin->email = 'johndoe@outlook.com';
  $admin->save();
  
  $admin->roles()->attach(1);

  $admin->roles()->attach(2);

  $brand_permissions = Permission::whereIn('name', ['index-brands', 'create-brand', 'edit-brand', 'delete-brand'])->get();

  $admin->attachPermissions($brand_permissions);

  } }`

`<?php

namespace App;

use Illuminate\Notifications\Notifiable; use Illuminate\Foundation\Auth\User as Authenticatable; use Zizaco\Entrust\Traits\EntrustUserTrait;

class User extends Authenticatable { use Notifiable, EntrustUserTrait;

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

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

}`