R with github private dependency

Question

I am developing an internal R package that will be stored and installed from github, but it depends on another R package, which is also in a private repo.

I know how to specify remote dependencies with the devtools Remotes:( vignette ) tag , and I know how to install private repositories using install_github(source, PAT). But how do I do this? The idea is for the server to simply install the package and also install all the github dependencies.