public function creator()
    {
        if (!method_exists($this, 'getFields')) {
            throw new BadMethodCallException('You are missing the Blameable Trait');
        }

        $fields = $this->getFields();
        $model = Config::get('culpa.users.classname', 'App\User');
        return $this->belongsTo($model, $fields['created']);
    }