Update lib documentation

**Feature request**
It would be great to have export for auth.

**Use case**
Many users need this functionality for production deployments.

**Implementation idea**
Add a new config option `enable_export` with default `false`.

Start by locating the lib documentation and configuration handling for the proposed `enable_export` option, then trace how auth export is currently represented. Done means documenting the option, using a default of `false`, and confirming that enabling it provides the requested auth export behavior.

Written by the indexing model from the issue text.