Right now, there's (undocumented) portions of the API to list and detail an env group.
There's seemingly no API to update the variables, or create new ones.
I tried using the GraphQL API that Render.com uses, but it apparently uses a different token than what the Rest API uses, so that didn't work.
Can you add "update vars for env group" and "create env group" operations to the Rest API?
I'd like this because I'd like to manage both dev and prod environment variables using the OSS CLI tool: https://github.com/kurtbuilds/render