Credential support for custom UI by node driver

Hi all,
I’m working on custom node template for CloudSigma docker-machine driver ( It works very well except I wanted to add cloudCredential support. There are not so many examples and it looks like cloudCredential types should exist in rancher/ui repository. I took a look on DigitalOcean component.js and template.hbs files under rancher/ui repo, but now I’m more confused.

Question: is it correct that it’s not possible to add a new cloudCredential type from node driver template?

Thanks for pointing me into the right direction.