Generate Runner's authentication token using gitlab-rails

GitLab CI/CD
3

I’m looking for non-interactive (programatically) way of generating the authentication token and then create the runner using gitlab-runner register command…

For example:

RUNNER_TOKEN = gitlab-rails runner ????

gitlab-runner register \
    --non-interactive \
    --executor "shell" \
    --url "https://gitlab.com/" \
    --token "$RUNNER_TOKEN"