Create an ER Diagram based on the following features:

1. Register a new user 2. Follow a user 3. Unfollow a user 4. Block a user 5. Unblock a user 6. Post a new message by a user 7. Reply to a message 8. Like a message 9. Share a message (re-tweet) 10. Unlike a message 11. Delete a message 12. Read all message from followed user 13. Search all messages based on a user 14. Search all message based on a keyword 15. Read notifications about posts made by users followed by some other user. 16. Read notifications about likes to posts made to messages from a logged user. 17. Read notifications about unlikes to posts made to messages from a logged user. 18. Engagement statistics for a given message a. Number of likes b. Number of dislikes c. Number of reads d. Number of replies e. Number of shares 19. Global statistics* for: a. number of posts b. number of posts per user, c. number of posts per day, week, or month.