How do you authenticate to the Github container registry

[gavargas22]

I would like to build from a docker image in the github container registry, I have tried multiple methods to provide my PAT token, but I always get an error during login in singularity build. What is the proper way of using Github container registry?

[github-actions]

New issues are no longer accepted in this repository. If singularity --version says singularity-ce, submit instead to https://github.com/sylabs/singularity, otherwise submit to https://github.com/apptainer/apptainer.