Github actions using locally licensed package

Question

I'm trying to setup a CI-pipeline using Github Actions for my Python scripts, but these scripts make use of a package that is not publically available and it requires a local license. Because of this, I cannot use it in Github Actions. I also haven't found a way to run the Github Actions locally using the local package (local Github pipelines often try to download requirements from the internet). Does anyone have a solution for this? Is there perhaps a way to do this in VS Code?