[Maven] Limited authentication possibilities for Maven repository

https://docs.gitlab.com/ee/user/project/packages/maven_repository.html outlines authentication with ci and private tokens. But it does not mention deploy tokens and regular username/password and they also do not seem to be working. I would expect maven repositories (and others) to be equivalent to the container registry. And it should probably also be possible to pass tokens as user name/password similar to the docker login.