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FireBase appears to support OAuth-based authentication from Facebook, Twitter, Google, GitHub. What about a different OAuth provider? It would be great if there were a generic "OAuth" option where in addition to specifying an API Key and Secret you specified whatever other information was needed.
Is it possible to use FireBase's existing OAuth-based authentication modules without rolling my own custom OAuth authentication module for FireBase, by possibly forking from one of the "built-in" OAuth mechanisms? Which one is the most generic, if so?
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Go to the Service Accounts page in your project's settings. Click Generate New Private Key at the bottom of the Firebase Admin SDK section of the Service Accounts page. The new service account's public/private key pair is automatically saved on your computer. Copy this file to your authentication server.
Firebase Authentication integrates tightly with other Firebase services, and it leverages industry standards like OAuth 2.0 and OpenID Connect, so it can be easily integrated with your custom backend.
Firebase gives you complete control over authentication by allowing you to authenticate users or devices using secure JSON Web Tokens (JWTs). You generate these tokens on your server, pass them back to a client device, and then use them to authenticate via the signInWithCustomToken() method.
Once you have a service account key file, you can use one of the Google API client libraries to generate a Google OAuth2 access token with the following required scopes: https://www.googleapis.com/auth/userinfo.email. https://www.googleapis.com/auth/firebase.database. Using the Google API Client Library for Node.
I also struggled for a while now with this, and here's how I've done it for my project. Run a node.js express server that will have the role to:
You will have to run the node server on a different vps in order for your app to work but you'll probably need it anyway if you have a bigger app that needs to run private stuff on the backend and not everything upfront.
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