Firebase gives you complete control over authentication by allowing you to authenticate users or devices using secure JSON Web Tokens (JWTs). … The custom JWT returned from your server can then be used by a client device to authenticate with Firebase (iOS+, Android, web).
Read moreHow do I access Firebase Storage image?
In order to access your Firebase Storage files, you’ll need to first get a reference to the FirebaseStorage object, and then create a StorageReference to your project’s URL and the file that you want to download . You can find your project’s URL at the top of the Files section of Storage in the Firebase Console.
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