These are the three API's for the following purpose
- Get all users order by most recent conversation with information of last message http://localhost/
- Send message to the other user, http://127.0.0.1:8000/sendmessage/ with post data={'message': 'message', 'sender_id': 2, 'receiver_id': 3}
- Get conversations between two users. http://localhost/getconv/user1_id/user2_id e.g. http://127.0.0.1:8000/getconv/2/7/