it is done

core/src/mindustry/net/ValidateException.java

@@ -0,0 +1,15 @@
+package mindustry.net;
+
+import mindustry.entities.type.Player;
+
+/**
+ * Thrown when a client sends invalid information.
+ */
+public class ValidateException extends RuntimeException{
+    public final Player player;
+
+    public ValidateException(Player player, String s){
+        super(s);
+        this.player = player;
+    }
+}