Allow Confluence Cloud instances to Claim the Subdomain from Google Webmaster Tool

Currently, customer is unable to claim the subdomain (example.atlassian.net) and manage their search directly from the Google Webmaster Tool.

This has caused the customers unable to properly market their contents successfully on the search engine.

Please provide a way to claim the subdomain from Google Webmaster, from one of the suggested ways by google:

1. add a verification file on the root domain
2. allow to add a html meta tag on the home page