* add anon sessions package
* add usage stat fn
* implement count for cache
* add anonservice to authn broker
* lint
* add tests for remote cache count
* move anon service to services
* wrap tagging in goroutine
* make func used
* AuthN: Add functionallity to test if auth client should be used
* AuthN: Add bolierplate client for api keys and register it
* AuthN: Add tests for api key client
* Inject service
* AuthN: Update client names
* ContextHandler: Set authn service
* AuthN: Implement authentication for api key client
* ContextHandler: Use authn service for api keys if flag is enabled
* AuthN: refactor authentication method to return additional value to
indicate if client could perform authentication
* update prefixes
* Add namespaced id to identity
* AuthN: Expand the Identity struct to include required fields from signed
in user
* Add error for disabled service account
* Add function to write error response based on errutil.Error
* Add error to log
* Return errors based on errutil.Error
* pass error
* update log message
* Fix namespaced ids
* Add tests
* Lint
