Emby systemd service is started by a user that doesn't exist

Support Software & Applications
5

The linked article at 3 provides an example :

Then extend the unit:

/etc/systemd/system/emby-server.service.d/write-permissions.conf

[Service] 
SupplementaryGroups=media 
ReadWritePaths=/mnt/media_files 
UMask=0002

This will add the emby user to the media group, and enable write permission to the /mnt/media_files directory through systemd. Rinse and repeat for any additional media folders you might have.

I’m no expert on the filesystem but using the home folder for this could be, or cause a problem.
In a case like this I would use something like /data/media/
Edit: follow up thread: Permissions look right, but Emby says it can't write to directory