Creating instances in another project when machine environment credentials selected

[knightsg]

We're trying to have instances created from an instance template in a different project by setting the alternate project name in the source project field in the cloudimage settings. We've also updated the service account for the TeamCity server to allow it to create and manage instances in the other project. However, we've observed that the instances are still being created in the same project as the TeamCity server. It seems that the code may only allow creating instances in other projects if the cloud profile is configured to use JSON private key credentials. Can you confirm if this is the case, and if so is that intentional? It's a bit confusing and not covered in the documentation.

[knightsg]

As a follow-up question, is it possible to reference JSON credentials from a parameter in the Edit JSON key text box? It doesn't appear so but it would be helpful to know if there's some possible way to do it.

Thanks!