Lightgallery dynamic. Adding an alt attribute?

Question

JavaScript

I am generating a lightgallery with the following dynamic script. Everything works as it should.

defer(function () {
                    $(document).ready(function () {
                        $("#lightgallery").on('click', function () {
                            $(this).lightGallery({
                                dynamic: true,
                                dynamicEl: [
                                @foreach (var photo in Model.Photos)
                                {
                                   
                                    @:{"src": '@Url.Action("GetPhoto", "Photo", new { photoId = photo.Id, photoName = photo.Name })', 'thumb': '@Url.Action("GetPhotoThumbnail", "Photo", new { photoId = photo.Id, photoName = photo.Name })' },
                                }
                                ]                              
                            });                                                 
                        })}
                    )});

Now I need to add an alt attribute to each photo. in the core of lightgallery, there probably isn't one. how to do it? Thank you very much in advance!