Honor Group Visibility level for Access to Groups API

Description

Honor Group Visibility level for Access to Groups API

Proposal

Currently, retrieving a public group's information via the API requires a token. Public groups are navigable in the web interface without authentication. We should reflect this in the Groups API

Links / references

Open an incognito window and navigate to:

Issue the following curl requests (without a token) to view the same information:

curl https://gitlab.com/api/v4/groups/gitlab-org/projects | jq

{
  "message": "401 Unauthorized"
}
curl https://gitlab.com/api/v4/groups/gitlab-org | jq

{
  "message": "401 Unauthorized"
}

Documentation blurb

Overview

What is it?

A tweak to the authentication requirements for accessing the Groups API

Why should someone use this feature?

Make publicly available Groups in the web interface also available in the API

Use cases

Who is this for? Provide one or more use cases.

API consumers wishing to index the projects within a publicly available group

Feature checklist

Make sure these are completed before closing the issue, with a link to the relevant commit.

Edited by Christina Lohr