Implementing firebase authentication in your server isn't such a bad idea; actually it may be a preferred approach if you're building a security-sensitive system. An overview of this approach is provided in this presentation.
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anyone to create user accounts indiscriminately. You can no longer rely on Firebase token verification for complete user authentication and authorization.
- Server-side authentication keeps your attackers moping - Change authentication stack anytime without having to ask your users to upgrade their app Look at them Come and hijack my authentication again na.