Private Repositories with Github private mode - vcpkg-configuration.json

[diehard2]

My organization switch to private mode. I can get all of my repository building using an AUTH_TOKEN environmental variable, which is great. However, I can't seem to figure out how to get it to work for the vcpkg-configuration.json file

{
  "registries": [
    {
      "kind": "git",
      "repository": "[email protected]:MyOrg/myorg-vcpkg-repository.git",
      "baseline": "506111bf4ab41c9c07b6f833b4b4fd1fad629350",
      "packages": [...]
    }
  ]
}

I've tried switching to the http address with the environmental variable, but that didn't work. Is there any way to do this? Ideally something like this would work

{
"registries": [
{
"kind": "git",
"repository": "http://${AUTH_TOKEN}@github.myorg.com/MyOrg/myorg-vcpkg-repository.git",
"baseline": "506111bf4ab41c9c07b6f833b4b4fd1fad629350",
"packages": [...]
}
]
}