Fix: Sustenence Effect, Player Corrected And Minor Fixes

src/main/java/it/polimi/ingsw/gc14/Model/Player.java

@@ -91,6 +91,14 @@ public class Player {
 
         this.PrestigeValue -= Value;
     }
+
+    public void setUserName(String UserName) throws IllegalArgumentException{
+        final int MAXLEN = 32;
+        if(UserName.isEmpty() || UserName.length() > MAXLEN){
+            throw new IllegalArgumentException();
+        }
+        this.UserName = UserName;
+    }
     // End setters
 
     // Constructors