The section in the documentation on 'Creating or Modifying an Authentication Node' is missing best practice information on how to "upgrade" the node in both an iterative development environment and a production environment.
The new section should contain information about implementing the "upgrade" method in the plugin class and then calling the pluginTools.upgradeAuthNode method. It may also require a version change for the plugin eg. when you’re changing the config options.
The information provided in the documentation should contain examples of how this should be implemented for both development and production environments.