Deluge login issues

I have to modify /etc/systemd/system/deluged.service and /etc/systemd/system/deluge-web.service from:

[Service]
User=debian-deluged

to

[Service]
User=root

otherwise both will be running but I can’t connect to it. The /var/log/deluged/daemon.log will say incorrect password.

Is there a reason for this?