Howdy does not work with swaylock

[parmjotsinghrobot]

I've been setting up Howdy with everything I need, and it works great, apart from swaylock. I've tried adding both lines (each line at a time);

auth sufficient /lib/security/pam_howdy.so
auth sufficient pam_unix.so try_first_pass likeauth nullok

To the files below, to no avail.

/etc/pam.d/swaylock
/etc/pam.d/system-auth
/etc/pam.d/system-local-login
/etc/pam.d/system-login

I can confirm that Howdy is working correctly, since it works with sudo, with it just gets it from system-auth.

If anyone can help me figure this out, I would really appreciate it.

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I've searched for similar issues already, and my issue has not been reported yet.

Linux distribution (if applicable): Arch Linux

Howdy version (sudo howdy version): Howdy 3.0.0 Beta