Description of the problem, including code/CLI snippet

I'm a trying to list all the branch of the current repository from a CI job. To do this I expected to be able to use the CI_JOB_TOKEN present in the environment of the CI jobs, but it turns out it is not possible.

The documentation seems to indicate that it should be possible though:

The token has the same permissions to access the API as the user that triggers the pipeline. Therefore, this user must be assigned to a role that has the required privileges.

gitlab_project_id = int(os.environ["CI_PROJECT_ID"])
server_url = os.environ["CI_SERVER_URL"]
job_token = os.environ["CI_JOB_TOKEN"]
gl = gitlab.Gitlab(server_url, job_token=job_token)  
gl_project = gl.projects.get(gitlab_project_id)

Expected Behavior

CI_JOB_TOKEN should let me access the current project.

Actual Behavior

404 Not found error is raised

Specifications

• python-gitlab version: 2.6.0
• Gitlab server version (or gitlab.com): version: 13.7.4-ee revision: 368b4fb2eee