Debian / Ubuntu / Devuan:

• adduser --system --group --no-create-home --home /var/lib/enswitch/home --disabled-password enswitch

Others:

• groupadd -r enswitch
• useradd -r -g enswitch -d /var/lib/enswitch/home enswitch

On multiple machine installations, ensure that the enswitch UIDs and GIDs are the same across all machines in the cluster.