Replace password by token authentification for GitHub release
You recently used a password to access the repository at GFZ/enpt with git using git/2.29.0.
Basic authentication using a password to Git is deprecated and will soon no longer work. Visit https://github.blog/2020-12-15-token-authentication-requirements-for-git-operations/ for more information around suggested workarounds and removal dates.
This refers for the Push Mirroring settings of the repo. See here how to solve it: https://docs.gitlab.com/ee/user/project/repository/repository_mirroring.html#setting-up-a-push-mirror-from-gitlab-to-github