{
   "data": {
      "viewer": {
         "account_user": null
      }
   },
   "errors": [
      {
         "message": "Errors while executing operation \"FBStoriesSingleItemTrayRootContainerQuery\": At Query.viewer:Viewer.account_user: Expected type \"User\" but got \"LoggedOutUser\".",
         "severity": "ERROR"
      }
   ]
}