Update index.js

Author: rayhanadev

index.js

@@ -1,5 +1,11 @@
-const User = require('./src/User.js');
+const user = require('./src/User.js');
+const post = require('./src/Post.js');
+const comment = require('./src/Comment.js');
+const leaderboard = require('./src/Leaderboard.js');
 
 module.exports = {
-  User: User.User
+  User: user.User,
+  Post: post.Post,
+  Comment: comment.Comment,
+  Leaderboard: leaderboard.Leaderboard
 }