Further to turbot/pipe-fittings#149 (and the fix turbot/pipe-fittings#150)

It would be beneficial in some cases to be able to setup steampipe connection resources as follows

connection "googledirectory" {
  plugin = "googledirectory"
  token_path = env("CLOUDSDK_ADC_MYDOMAIN")
}

but when attempting to run, this yields

steampipe query
Error: Internal Error: Failed to load config: Function calls not allowed: Functions may not be called here.
(/Users/kaja/Documents/Code/Steampipe/config/googledirectory.spc:3,16-56)

Version info: Steampipe v1.0.0 on arm64 macOS 15.1 (24B82)