android multiple users question

So I want to be able to run more than 3 (default) users on Android in the background.

After doing some research I found that this is what needs to be changed.

“config_multiuserMaxRunningUsers”

How can change this config file and where is it located on a stock Google Pixel 3?
Does this require root access to change?

thanks! brand new to github have some basic programming experience.