CSV Census notifications or auto-authorizations

Since decidim 0.17 we have a CSV Census verification, so an organization admin can upload a list of email addresses to be validated as "organization census", but the users are not notified that they are in the Census, so we have to add a functionality to notify the users or auto-authorize existing users and auto-authorize new users registered with the email added to the census. We can also send emails with the notification: "Added to organization census" but is a issue with GDPR