yii\base\UnknownMethodException error when trying to $model->save() with yii2 non-table model

Question

I'm getting Calling unknown method: app\modules\employee\models\NewEmployeeForm::save() error when trying to do $model->save();

I assumed save() method is inherited from Model, but then this happened. Do I need to write my own save method? I want to follow the yii2 way of doing things.

below is my model

thanks in advance

use common\models\User;
use yii\base\Model;
use Yii;

/**
 * Signup form
 */
class NewEmployeeForm extends Model
{
    public $nik;
    public $pin;
    public $company_id;
    public $category_id;
    public $first_name;
    public $last_name;



    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
         [['pin', 'company_id', 'category_id'], 'integer'],
         [['nik'], 'string', 'max' => 255],
         [['first_name', 'last_name'], 'string', 'max' => 255],
        ];
    }


}