Adds support for phone numbers and usernames, in addition to or instead of to a user's full name and email address.
Some identity providers do not use email addresses and full names to identify users. This makes it easier for such IdPs to adopt FedCM.
None
Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications?
None
Same as existing FedCM.
No milestones specified