FR: admin.auth().generateVerifyAndChangeEmailLink()

[marchbox]

Feature request

The JS API includes firebase.auth().currentUser.verifyBeforeUpdateEmail() method. This is a great way to make sure the ownership of the new email, also avoid inability to sign in in case the user made a typo when changing their email.

But currently there's no way to customize the email template for this. Also the custom email action handler is not well documented (on this page, no mention of the mode verifyAndChangeEmail).

Would be great if, in the admin SDK, there was firebaseAdmin.auth().generateVerifyAndChangeEmailLink().