seeding problem - user model

user.php

<?php

use Illuminate\Auth\UserTrait;
use Illuminate\Auth\UserInterface;
use Illuminate\Auth\Reminders\RemindableTrait;
use Illuminate\Auth\Reminders\RemindableInterface;

class User extends Eloquent implements UserInterface, RemindableInterface {

	use UserTrait, RemindableTrait;

	/**
	 * The attributes excluded from the model's JSON form.
	 *
	 * @var array
	 */
	protected $hidden = array('password', 'remember_token');


    /**
     * To protect against mass assignment attacks white-list some variables
     *
     * @var array
     */
    protected $fillable = array('username', 'email', 'password');

    public function setPasswordAttribute($password)
    {
        $this->attributes['password'] = Hash::make($password);
    }
}