v1.0.0 is a release file of the Minecraft plugin Sign-In-Command, made for Minecraft 1.16. It was published on October 17, 2021 and is 0 MB in size. For the full description, screenshots and every other version, visit the Sign-In-Command plugin page.
How to install: Put the .jar into the plugins folder of your Paper, Spigot or Bukkit server and restart the server.