Docs link broken in Usage section of README

[aaron-junot]

Problem description

The README.md says to read the Graylog documentation for usage, but it links this page http://docs.graylog.org/en/stable/pages/users_and_roles/external_auth.html#single-sign-on which is currently a 404. I did a quick search in the Graylog docs table of contents for Single-sign-on and SSO and neither came up with anything so I'm wondering if these docs exist in the current Graylog documentation? If not, where can one find usage docs for this plugin?

Steps to reproduce the problem

1. Click on link in README.md for Usage docs
2. Observe 404 error

Environment

• Graylog Version: N/A
• Plugin Version: N/A
• Elasticsearch Version: N/A
• MongoDB Version: N/A
• Operating System: N/A
• Browser version: N/A

[aaron-junot]

I found this page https://docs.graylog.org/en/3.1/pages/users_and_roles/external_auth.html#single-sign-on

I assume this is the correct Usage docs?

[oscarlofwenhamn]

#65 (comment)

This module will be deprecated and isn't suitable for integrating external identity providers.
I'm going to close it because we have no current plans on extending this plugin.

Thanks!

Related to plugin deprecation? That could explain it not being in the stable version of the docs.

Edit: Scratch that, it is still there in the latest version, incorrect usage of stable in the url seems to be the issue rather than deprecation.