VK api get current group id?

Question

API

The problem is getting the group_id
I get the access_token of the group and log in,
then I want to install CallbackServer, but this requires a group_id (for technical reasons I get only a token, without a group id)
And now the task is to get the id of the group from which I logged in, but nothing didn't find it on google

Answer 1

figured out, id can be obtained through groups.getById without specifying additional fields, and then [0]['id'] is taken