Hello! Thank you very much for this great plugin!

So, I have a question. I really need token auth for jenkins/gitlab-webhook/post requests from gitlab (after push branches, tags, mrs, etc.), otherwise anyone can send webhook to this uri without authentication, I feel this is a security problem.

I know about token authorization feature on uri /project/.* (from gitlab plugin), but this feature is not available on gitlab-branch-source-plugin .

Excuse for troubling.