I found this interesting as it has gained a significant amount of GitHub stars in a short period of time. From a brief look at the code, it seems it just makes requests to chat.openai.com as if someone was using ChatGPT, for free, via the browser. This somehow automates it, and seemingly, without credentials.

EDIT: I didn't realize that ChatGPT can now be used without a login. That seems to be how this can function without credentials.