Add unit tests for store

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

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

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

Start by locating the store implementation and its existing unit tests; the issue does not name their paths. Trace how configuration options are loaded, then verify that enable_monitoring defaults to false and covers the requested auth monitoring behavior.

Written by the indexing model from the issue text.