How to upload an avatar for a VK API group?

Question

In contact with

1. I get the URL for uploading using - photos.getOwnerPhotoUploadServer (I pass the identifier with the -{groupID} sign)
2. I upload the image using the curl to the received URL
3. I pass the received parameters in step 2 to the - photos.saveOwnerPhoto method, then
the avatar changes, but not for the group, but for the user under which I perform requests. What am I doing wrong?

Answer 1

Because when you call photos.getOwnerPhotoUploadServer you pass the owner_id of your user and not the group, you need to pass the group ID with a minus sign

Обратите внимание, идентификатор сообщества в параметре owner_id необходимо указывать со знаком "-" — например, owner_id=-1 соответствует идентификатору сообщества ВКонтакте API (club1)