`huggingface_hub` can be configured using environment variables.  
If you are unfamiliar with environment variable, here are generic articles about them
[on macOS and Linux](https://linuxize.com/post/how-to-set-and-list-environment-variables-in-linux/)
and on [Windows](https://phoenixnap.com/kb/windows-set-environment-variable).  
This page will guide you through all environment variables specific to `huggingface_hub`
and their meaning.