mash/login/manifest.json

{
  "manifest_version": 1,
  "name": "mojo:login",
  "display_name": "Login",
  "capabilities": {
    "required": {
      "*": { "classes": [ "app" ] },
      "mojo:mash_init": { "interfaces": [ "mash::init::mojom::Init" ] },
      "mojo:ui": { "interfaces": [ "ui::mojom::UserAccessManager" ] },
      "mojo:shell":  { "classes":  ["shell:all_users"] }
    }
  }
}