Add configuration options for analytics

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

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

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

Start by locating the configuration handling and authentication entry points in the repository, since the issue names no files or tests. Confirm that a new enable_logging option defaults to false, then verify that enabling it produces authentication logs without changing the default behavior.

Written by the indexing model from the issue text.