If you've authorized Alexa to access your Google Analytics and Search Console data for use in the Alexa service, you can remove that authorization at any time. To do that:
- Login to your Google account.
- Visit https://security.google.com/settings/security/permissions (That page shows all the apps currently connected to your Google account)
- Click on "Alexa Internet"
- Click "Remove"
Note that currently Google authorization is only available on our Advanced plan and is part of our On-Page SEO Checker tool. You can find out more about our On-Page SEO Checker tool in this blog post: How to Check On-Page SEO with Alexa.