I can't believe we didn't have an unban command

src/main/java/dev/plex/command/impl/DeopCMD.java

@@ -0,0 +1,38 @@
+package dev.plex.command.impl;
+
+import com.google.common.collect.ImmutableList;
+import dev.plex.command.PlexCommand;
+import dev.plex.command.annotation.CommandParameters;
+import dev.plex.command.annotation.CommandPermissions;
+import dev.plex.command.exception.CommandArgumentException;
+import dev.plex.rank.enums.Rank;
+import dev.plex.util.PlexUtils;
+import java.util.List;
+import net.kyori.adventure.text.Component;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+@CommandParameters(name = "deop", description = "Deop a player on the server", usage = "/<command> <player>")
+@CommandPermissions(level = Rank.ADMIN, permission = "plex.deop")
+public class DeopCMD extends PlexCommand
+{
+    @Override
+    public Component execute(CommandSender sender, String[] args)
+    {
+        if (args.length != 1)
+        {
+            throw new CommandArgumentException();
+        }
+        Player player = getNonNullPlayer(args[0]);
+        player.setOp(false);
+        PlexUtils.broadcast(tl("oppedPlayer", sender.getName(), player.getName()));
+        return null;
+    }
+
+    @Override
+    public @NotNull List<String> tabComplete(@NotNull CommandSender sender, @NotNull String alias, @NotNull String[] args) throws IllegalArgumentException
+    {
+        return args.length == 1 ? PlexUtils.getPlayerNameList() : ImmutableList.of();
+    }
+}