Laravel 5 - Laracast Easy Auth - Save Article

I followed the laracast tutorial on simple auth ( Easy Auth ) but there were some gaps in the video I had to declare

 use Auth;

      

        
        
        
      

    

to be able to get the current user, however, when I save the article I get this error

FatalErrorException in ArticleController.php line 42:
Call to undefined method Illuminate\Database\Eloquent\Collection::save()

      

        
        
        
      

    

where is the relevant code in my ArticleController

public function store(ArticleRequest $request)
{
    $article = new Article($request->all());

    Auth::user()->articles->save($article);

    return redirect('blog');
}

      

        
        
        
      

    

My article model:

<?php namespace App;

use Illuminate\Database\Eloquent\Model;
use Carbon\Carbon;

class Article extends Model {

protected $fillable = [
'title',
'body',
'published_at',
'user_id'
];

protected $dates = ['published_at'];

public function scopePublished ($query)
{
    $query->where('published_at', '<=', Carbon::now());

}

public function scopeUnpublished ($query)
{
    $query->where('published_at', '>', Carbon::now());

}

public function setPublishedAtAttribute($date)
{
    $this->attributes['published_at'] = Carbon::parse($date);
}

public function user()
{
    return $this-> belongsTo('App\User');
}

}

      

        
        
        
      

    

My user model

<?php namespace App;

use Illuminate\Auth\Authenticatable;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Auth\Passwords\CanResetPassword;
use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
use Illuminate\Contracts\Auth\CanResetPassword as CanResetPasswordContract;

class User extends Model implements AuthenticatableContract,     CanResetPasswordContract {

use Authenticatable, CanResetPassword;

/**
 * The database table used by the model.
 *
 * @var string
 */
protected $table = 'users';

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

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

public function articles()
{
    return $this-> hasMany('App\Article');
}
}