Design a simplified version of Twitter where users can post tweets, follow/unfollow another user, and is able to see the 10 most recent tweets in the user's news feed.
Aspects to cover:

• APIs (Request/Response)
• DB Schemas

Implement the following in any IDE (https://leetcode.com/problems/design-twitter/description/):

1. Twitter(): a constructor to initialize the Twitter object.
2. postTweet(userId, tweetId): allows a user to post a tweet.
3. getNewsFeed(userId): retrieves the 10 most recent tweets from the user and the users they follow.
4. follow(followerId, followeeId): allows a user to follow another user.
5. unfollow(followerId, followeeId): allows a user to unfollow another user.