We have been working hard behind the scenes on the upcoming release of our new git package named gert, a joint effort from rOpenSci and the Tidyverse team. One of the main features of gert is the out-of-the-box authentication mechanism, which is provided via the new credentials package.
This is a companion discussion topic for the original entry at https://ropensci.org/blog/2020/07/07/github-pat/