How to use a private Repo with enviroment variables in a scala-cli Script

Question

According to the scala-cli doc you can define a Repo like this:

//> using repository "https://maven-central.storage-download.googleapis.com/maven2"

And you can specify environment variables like this:

//> using publish.secretKey "env:PUBLISH_SECRET_KEY"

However there is no directive for repository.username, so I need something like

//> using repository "https://env:MYUSER:env:MYPASSWORD@myprivaterepom.com"

Using the user and password directly works - but that is not really an option;).