Add TypeScript types for auth

**Feature request**
It would be great to have encryption for utils.

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

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

The title asks for TypeScript types for auth, while the body asks for encryption in utils and an `enable_encryption` config option; no files, tests, or entry points are named. Clarify which change is intended, then locate the relevant configuration and authentication or utility code; done should include the requested behavior with the option defaulting to `false`.

Written by the indexing model from the issue text.