Polymorphic Relationship with pivot

Hi I am having problems with relation and database design.

There are three tables called

'articles' , 'users' , 'companies' and articles_authors as polymorphic pivot with one attribute each called id: I implements this models

class Article extends Model
{

    public function authors()
    {
        return $this->hasMany('App\Article_Authors','article_id');
    }
}

class Article_Authors extends Model
{

     public function authorable()
    {
        return $this->morphTo();
    }

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


class User extends Model
{

    public function authors()
    {
        return $this->morphMany('App\Article', 'authorable');
    }
}


class Company extends Model
{

    public function authors()
    {
        return $this->morphMany('App\Article', 'authorable');
    }
}

and after call $article->authors i get

0   
id  1
record_id   2
authorable_id   1
authorable_type "App\User"
created_at  "2019-03-22 15:56:38"
updated_at  "2019-03-22 15:56:38"
1   
id  2
record_id   2
authorable_id   1
authorable_type "App\Company"
created_at  "2019-03-22 15:56:59"
updated_at  "2019-03-22 15:56:59"

how to call this models now :(