Thanks for your feedback.

You just need an Immich API key, and run it from any machine from where you can reach your Immich instance. It does everything using the Immich API, so only a key with the proper permissions is needed. (I'll add what the minimum required permissions are in the README.)

Also, if you want to do it for many users, you don't need them to run it on individual machines/accounts. You can create multiple config files, each with that user's key, and pass it to the script via the --config flag.

If running it for multiple users is a thing that people are interested in, I can add a way to supply an array of options in the config file, each belonging to one user.