Firebase Docs Reference firebase. UserInfo User profile information, visible only to the Firebase project's apps. Index Properties displayName email phoneNumber photoURL providerId uid Properties displayName displayName: string | null email email: string | null phoneNumber phoneNumber: string | null photoURL photoURL: string | null providerId providerId: string uid uid: string The user's unique ID. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated March 22, 2019.