changes to leaderboard highlight

lib/models/profile.dart

@@ -1,10 +1,10 @@
 class Profile {
   final String username;
   final int points;
+  final String id;
 
   Profile.fromMap(Map<String, dynamic> map)
       : username = map['username'],
-        points = map['points'] ?? 0;
-
-  Profile(this.username, this.points);
+        points = map['points'] ?? 0,
+        id = map['id'];
 }