In https://www.drupal.org/node/2734521#comment-11234553 → @sanduhrs says:
In case you add a new client class that should be kept private please use a custom module and initialize your settings on install of that module.
But I'm unable to find any guidance or documentation on exactly how to go about doing this. I can see the "Generic" client class in plugins/openid_connect_client/generic, but need a little more help on how to massage this in my own module. If someone can provide some steps/guide or an complete example, I'd be happy to add it to the official documentation at https://www.drupal.org/node/2274339 → .
Thanks!
Fixed
1.0
Documentation
A documentation change is requested elsewhere. For Drupal core (and possibly other projects), once the change has been committed, this status should be recorded in a change record node.
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Issue #2838394 by sanduhrs: Provide documentation for creating custom...
Committed this as an example to the module.
Automatically closed - issue fixed for 2 weeks with no activity.