This step 3 for Facebook is still not working:
3. Return to the data browser. Manually add the Facebook provider and your Facebook application credentials:
It is not possible to add a: _id with namne facebook.
It is not possible to upload it as a json. It will be added as a file.
If you first add all the columns and then go to settings and upload a json file with the keys, the columns will be gone when you select the databrowser again.
You can add it as it is laid out in the post, but it has to be done via a post request via the API console: which will look something like this:
"consumer_key" : "abc",
"consumer_secret" : "123"
Please let me know if you have any additional questions.