{
  "users": [
    { "username": "user1", "password": "user1secret" },
    { "username": "user2", "password": "user2secret",
      "permissions": {
	"publish": ["hello.*"],
	"subscribe": ["hello.world"]
      }
    }
  ],
  "default_permissions": {
    "publish": ["SANDBOX.*"],
    "subscribe": ["PUBLIC.>"]
  }
}

Add example JSON config for auth
Add example JSON config for auth
