How to return additional fields in photos.getAlbums?

Question

Classmates

Good afternoon!
I get information about the user's albums using photos.getAlbums
Returns the following result:

I also need to get additional fields - the album cover and the number of photos in it.
I try to do it through

'fields'	=> 'album.AID,album.MAIN_PHOTO,album.PHOTOS_COUNT

returns an empty array of albums (no errors).
Can you tell me how to get the required fields in the request? Thanks

Answer 1

For group albums, when requesting fields, use the group_album prefix.
For example, group_album.aid. Full list of fields - https://apiok.ru/dev/types/group.GroupPhotoAlbumBe...