'Including' private project file using `$CI_JOB_TOKEN`

Question

What I got so far is, it is possible to Authenticate with Personal Access Token and include external CI script but a cleaner approach would be

Answer 1

Still there is no support for the CI_JOB_TOKEN to have a useful API access. But they are working on it https://gitlab.com/groups/gitlab-org/-/epics/3559