Update MySQL Database

Hi
I have use Home Assistent for sometime and did make a clean installation some weeks ago.
That version of Home Assistent I did use then was very old so I have now a new version of Home Assistant.

To save data from Home Assistent I use Mysql on another server and use database recorder.
But wonder about the guide
Recorder - Home Assistant (home-assistant.io)

I’m not sure if “Installation notes” works with hassio?
For example
“sudo -u homeassistant -H -s” I have to use “sudo -u hassio -H -s”
But that is emty in the srv folder?