{
  "rules": {
    ".read": "auth != null",
    ".write": "auth != null",
    "messages": {
      "$msg_id": {
        ".validate": "auth.is_operator == true || newData.child('conversation_id').val() == root.child('chat_users').child(auth.uid).child('conversation_id').val()"
      }
    },
    "active_admins": {
      ".read": true,
      ".write": "auth != null"
    }
  }
}