Add a user to a group, in Looker, using Api - try with curl or Postman

[kalina]

Hi,

I need to add a user to a certain group in Looker.

I have logged in, retrieved the token, retrieved the user id (ex: 80) and group id (ex: 8 ) for certain users and group names, but I am not able to add the user to group with the following api: https://looker-blablabla/api/4.0/groups/8/users, body: {"user_id": 80}, even though I have successfully added it using the marketplace_extension_api_explorer - what am I doing wrong?

Can anyone help?

Thanks,

GJ