Load images from a private github repo

I am making a shiny app that links to images from a github repo. This works fine when the repo is public but I can't work out how to make it work when I make the repo private.

I have set up a private access token using:
usethis::create_github_token() #which takes me to a github page to create the token

How do I use the token to load the images from the private repo?