* Add `Service. IsClientEnabled` and `Client.IsEnabled` functions
* Implement `IsEnabled` function for authn clients
* Implement `IsClientEnabled` function for authn services
* AuthN: Add NamespaceID struct. We should replace the usage of encoded namespaceID with this one
* AuthN: Add optional interface that clients can implement to be able to resolve identity for a namespace
* Authn: Implement IdentityResolverClient for api keys
* AuthN: use idenity resolvers
Co-authored-by: Misi <mgyongyosi@users.noreply.github.com>
* Add function to get the namespaced id
* Add function to resolve an identity through authn.Service from org and namespace id
* Switch to resolve identity for re-authenticate in another org
