Is JINJA supported in the connections.toml file?

[cm-beeline]

Good Morning,
Prior to the release of 4.0 I was storing Snowflake credentials (password authentication) in Github Actions secrets. I would then retrieve those secrets and set env variables in the actions workflow .yml files and then set the authentication parameters in schemachange-config.yml by accessing those env vars with JINJA.

When switching to using connections.toml I haven't been able to access those env vars with JINJA. Is this supposed to be supported? Does anybody have an example of how this would be achieved? I want to avoid storing credentials as plain text in connections.toml

Thanks for any help you can provide