How to save the selected assets in custom module

Question

I am trying to create a custom module where I have created an asset uploader field. Images are getting uploaded with that field but not saved.

class Settings extends Model
{
   // Public Properties
    // =========================================================================
    public $imageId = [];


    // Returns the validation rules for attributes.
    public function rules()
    {
        return [
            [['imageId'], 'required'],

           
        ];
    }

    public function getimages()
    {
        return Craft::parseEnv(trim(Ig::getInstance()->getSettings()->imageId));

        }
    
}