Sync Function example: blocking new doc writes on user port

function isAdmin() {

  try {

    requireAdmin();

    console.log("document was edited by an Admin");

  } catch (err) {

    console.log("document was edited by an regular user " + err);

    return false;

  }

}

admin=isAdmin();

if (admin === false) {

  if (oldDoc == undefined) {

    throw ({

      forbidden: "Document "+ doc._id +" cannot create documents from client, rejecting "

    })

  }

}