If you need to pull pages from Google search results, you have reliable...

https://www.tumblr.com/distantlyperpetualharbinger/811808907244797952/should-i-block-a-page-behind-a-login-to-remove-it

If you need to pull pages from Google search results, you have reliable options. Use a noindex tag in your page code to tell search engines to stop indexing the content. If you deleted a page permanently, return a 404 or 410 status code