Uids will not be showed until the parameter <uid> is added,

like this: /list uid

src/main/java/emu/grasscutter/command/commands/ListCommand.java

@@ -8,29 +8,41 @@ import emu.grasscutter.game.player.Player;
 import java.util.List;
 import java.util.Map;
 
-@Command(label = "list", description = "List online players")
+@Command(label = "list", usage = "list [uid]",
+        description = "List online players", aliases = {"players"})
 public final class ListCommand implements CommandHandler {
 
     @Override
     public void execute(Player sender, List<String> args) {
         Map<Integer, Player> playersMap = Grasscutter.getGameServer().getPlayers();
+        boolean needUID = false;
+
+        if (args.size() > 0) {
+            needUID = args.get(0).equals("uid");
+        }
 
         CommandHandler.sendMessage(sender, String.format("There are %s player(s) online:", playersMap.size()));
 
         if (playersMap.size() != 0) {
             StringBuilder playerSet = new StringBuilder();
+            boolean finalNeedUID = needUID;
+
             playersMap.values().forEach(player -> {
                 playerSet.append(player.getNickname());
 
-                if (sender != null) {
-                    playerSet.append("<color=green><UID:")
-                            .append(player.getUid())
-                            .append("></color>, ");
-                } else {
-                    playerSet.append("<UID:")
-                            .append(player.getUid())
-                            .append(">, ");
+                if (finalNeedUID) {
+                    if (sender != null) {
+                        playerSet.append("<color=green><UID:")
+                                .append(player.getUid())
+                                .append("></color>");
+                    } else {
+                        playerSet.append("<UID:")
+                                .append(player.getUid())
+                                .append(">");
+                    }
                 }
+
+                playerSet.append(", ");
             });
 
             String players = playerSet.toString();