解决办法,自己注册github账号获得Key:
devtools::install_github("ricardo-bion/ggradar",auth_token="ghp_gOOTBksr1PPuPT")
install_github("ricardo-bion/ggradar")
Using github PAT from envvar GITHUB_PAT. Use `gitcreds::gitcreds_set()` and unset GITHUB_PAT in .Renviron (or elsewhere) if you want to use the more secure git credential store instead.
Error: Failed to install 'unknown package' from GitHub:
HTTP error 401.
Bad credentials
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