It would be great if I could see immediately from the Phabricator UI (e.g. hovercard) whether a user possesses a certain type of external account.
Possible solution: Creating an automated badge that displays for all users with certain types of external accounts would solve this.
Use case: On our install all internal users register and authenticate via a custom authentication provider (REMOTE_USER via GSSAPI authentication). Using such a badge we could easily distinguish internal and external users.