What is phone Auth?

Phone authentication allows users to sign in to Firebase using their phone as the authenticator . An SMS message is sent to the user (using the provided phone number) containing a unique code. Once the code has been authorized, the user is able to sign into Firebase.

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How do I authorize Firebase?

To authenticate a service account and authorize it to access Firebase services, you must generate a private key file in JSON format . To generate a private key file for your service account: In the Firebase console, open Settings > Service Accounts. Click Generate New Private Key, then confirm by clicking Generate Key.

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