Hey, I just tested the API on my end. It's working fine now. Actually I ran out of credits on my Heroku server. Sorry for the inconvenience caused to you. Let me know if you are still facing any trouble. You can email me directly at amansharma2910@gmail.com

Hi. If you can be a bit more specific regarding what exactly the issue is that you are facing, I might be able to modify the instructions better and probably solve your problem.