Streaming

https://www.hifiberry.com/docs/projects/create-your-own-radio-station-with-the-hifiberry-dac-adc-and-icecast/
Firstly, I feel daft for not finding this earlier! Thanks for the awesome tutorial!!

Looking at the post, I would like to make a couple of changes.
Firstly, how do I change things to broadcast from a user account from bootup? It's currently running from root, so for obvious reasons, I would like to change this.

Also, is it possible to stop the service and restart it with a simple command line? 

Thanks!