[Unit]
Description=Start tmux in detached session
After=ssh.service

[Service]
User=%I
Environment=DISPLAY=:0
Environment=XAUTHORITY=/tmp/xauth-1000-_0
WorkingDirectory=/home/%I
ExecStart=/bin/bash /home/%I/.bin/tmux_start 
RemainAfterExit=True
Type=oneshot

[Install]
WantedBy=default.target