Using Drupal to authenticate user on a remote web site I have a custom php web site on which I need to authenticate users based on their credentials in a Drupal site.  I am not very experienced with Drupal but am (mostly) finding my way.  It is a Drupal 7 site.

I have found that I need the Services, Rest Server and Libraries module and they are all installed.  I am using this tutorial for setting up Drupal:
https://www.drupal.org/node/2424977

and this code for my remote site:
Using drupal login system for another platform

I am stuck on the tutorial where I am trying to get a user token from the Drupal site.  I have set up an endpoint ("rest", and when I go to it in a browser I get:
"Services Endpoint "remotetest" has been setup successfully."
However in the Firefox RESTClient when I try to post to https://sub.domain.org/rest/user/login.json I get:

Status Code: 404 Not found : Could not find resource user.
Cache-Control: no-cache, must-revalidate
Connection: Keep-Alive
Content-Length: 0
Content-Type: text/html; charset=UTF-8
Date: Wed, 08 Nov 2017 18:55:24 GMT
Expires: Sun, 19 Nov 1978 05:00:00 GMT
Keep-Alive: timeout=5, max=100
Server: Apache/2.4.18 (Ubuntu)
X-Content-Type-Options: nosniff


I have tried a few things like enabling Drupal permissions for the Services module for anonymous users (all items except manage Services) but don't know what else to do. I have also tried the login directly (why would I need a token?) but I get an error "The requested URL returned error: 404 Not found : Could not find resource user." It seems like steps are missing in the tutorial.

Suggestions?
The tutorial does not indicate that you must enable the user resource in the rest service you set up.  Doing so allows it to work.