Puzzlescript Plus requires a slightly different way to authenticate your GitHub account so I don't have to set up a server to handle it properly. Sorry! Here's how it works:

1) Go to the New Personal Access Token page on GitHub.
2) As the Note, enter Puzzlescript Plus (or anything you want, really).
3) For Scopes, make sure you ONLY check "gist". Leave the rest disabled, if you enable more it can become a security risk for your account.
4) Then, click "Generate token". On the next page, you'll be able to see the new personal access token. This code acts basically a password for your account, so don't share it anywhere but here! Copy it down here, press submit, and it should work!

Need more help? A detailed explanation is available in the Github Docs.

Credits to Clément Sparrow for implementing this alternative Github authentication method!