To preview the ui just press on this link: https://ztzbx.github.io/auth-interface/static/
To build it, run build.cmd. To run it, run the following commands to make a symbolic link in your server data directory:
cd /d [PATH TO THIS RESOURCE]
mklink /d X:\cfx-server-data\resources\[local]\auth-interface dist
Afterwards, you can use ensure auth-interface in your server.cfg or server console to start the resource.