/etc/systemd/system/vncserver@.service

[Unit]
Description=Remote desktop service (VNC)
After=syslog.target network.target

[Service]
Type=forking
User=smiledt
Group=smiledt
WorkingDirectory=/home/smiledt
#PAMName=smiledt

PIDFile=/home/smiledt/.vnc/%H.domain.local:%i.pid
ExecStartPre=-/usr/bin/vncserver -kill :%i > /dev/null 2>&1
ExecStart=/usr/bin/vncserver -geometry 1024x768 -depth 24 -localhost no :%i
ExecStop=/usr/bin/vncserver -kill :%i

[Install]
WantedBy=multi-user.target