How to lock screen on lid closing using systemd?

I am running Sway on Fedora 26 and want my laptop to be locked when I close my screen. I changed HandleLidSwitch to lock in /etc/systemd/logind.conf and ran systemctl restart systemd-logind after that. However, closing the lid does nothing. The lock program I intend to use is Swaylock and I can manually call it by runnig the command swaylock in a terminal. How do I make Systemd call swaylock when it tries to close the screen (as instructed to do in logind.conf)?