[1] Base62 - Wikipedia (2021-04-02T21:29:55.000Z, 2021-04-06T02:05:47.769Z) https://en.wikipedia.org/wiki/Base62

[2]

Behind GitHub's new authentication token formats - The GitHub Blog (2021-04-06T02:06:20.000Z) https://github.blog/2021-04-05-behind-githubs-new-authentication-token-formats/#checksum

We then encode the result with a Base62 implementation, using leading zeros for padding as needed.