Lately I have been getting this error on occasion when running devtools::install() in R:
> devtools::install()
Error: HTTP error 401.
  Bad credentials
  Rate limit remaining: 59/60
  Rate limit reset at: 2023-07-27 21:55:54 UTC
The solution, from https://community.rstudio.com/t/unable-to-install-packages-from-github/124372, is to do
Sys.unsetenv("GITHUB_PAT")
There have been past reports on this in the devtools package, but it was apparently fixed some time ago. I am using Mac OS 13.4, R 4.2.3. This line does fix it, though.
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Citation
BibTeX citation:
@online{o'meara2023,
  author = {O’Meara, Brian},
  title = {Github Rate Limit},
  date = {2023-07-27},
  url = {https://brianomeara.info/posts/githubratelimit/},
  langid = {en}
}
For attribution, please cite this work as:
O’Meara, Brian. 2023. “Github Rate Limit.” July 27, 2023.
https://brianomeara.info/posts/githubratelimit/.