It looks good to me. I did basically the same steps as the tutorial you followed. I was having trouble with Google so I just went to the Google Developers Console, created a new Client ID, and then replaced the new keys with the old. I also included the same URL but as a http:// instead of an https://, but after I saw that it started working again I took the http:// out and it still works.
Other than that make sure everything is spelled correctly and good luck.