Not possible because Twitter does not allow access to the user's email address.
Microsoft (in Webflow)
Microsoft requires a special folder and file to verify your domain. Unverified accounts have an ugly "unverified" banner that is displayed to members during signup and login. At this time, Webflow does not allow us or you to add this required file. Please upvote the feature here. All that said, it is possible to work around this via Cloudflare workers.
Here's a link to our docs.