Tools like check50 and submit50 rely on
git, a popular tool for saving different versions of code, and GitHub, a popular website for saving those versions in the cloud. To push (i.e., save) your code to GitHub using
git, it used to be possible to log into GitHub via a command line (as in a terminal window) using a GitHub username and password. As of August 13, 2021, that’s no longer possible, which means you can no longer use
submit50 using your GitHub username and password either.
See https://cs50.readthedocs.io/github/ for all details.
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