My personal configuration for lightdm-webkit-greeter. Unixporn post https://www.reddit.com/r/unixporn/comments/5f2q73/lightdmwebkitgreeter_fresh_installation_of_arch/?st=iw12h5uu&sh=bc9b88c8
This is really bad and hardcoded. You can use it if you really want. You should probably improve it though if you really want to use it. It probably won't work well with multiple users. You should also have Arch Linux otherwise it's false advertising and I'll sue you.