Non-existent param "Fingerprint" in google contactsGroup api

Question

I'm trying to update the label in google contacts using the method from the docs https://developers.google.com/people/api/rest/v1/contactGroups/update

Got a response

{
  "error": {
    "code": 400,
    "message": "Fingerprint is missing.",
    "status": "INVALID_ARGUMENT"
  }
}

Even though Google API Explorer

How solve this, maybe someone can help. What does this Fingerprint mean? I can create/delete label but not update!

Answer 1

You have to include the etag.

If you go to Method: contactGroups.get or the Method: contactGroups.list, on the response you will find the groups 'etag'

Then on the Method: contactGroups.update request body you set the new name you want the group to have and also include the etag like this:

{
  "contactGroup": {
    "name": "newOne2",
    "etag": "r*****k="
  }
}