Transfer users from MongoDB to firebase

Question

I have a native app/website with MERN stack. Recently, I started working on the app from scratch (RN) and I was thinking to add Google/Facebook auth, I know I need firebase anyway but I have around 750 registered users.

I want to set up the login/registration with firebase only even for a simple email, but what am I supposed to do with the existing users? Their info is stored in MongoDB with hashed password, any idea how to implement such a thing?

https://firebase.google.com/docs/auth/admin/import-users you can import them using CLI — Amod Gokhale, Dec 26 '20 at 13:53
That looks like an answer @AmodGokhale :) Especially if you also link to the CLI command to do the same: https://firebase.google.com/docs/cli/auth — Frank van Puffelen, Dec 26 '20 at 15:51

score 0 · Answer 1 · answered Dec 26 '20 at 16:32

Convert DB to JSON - Dump Mongo Collection into JSON format
Install Firebase CLI - https://firebase.google.com/docs/cli
Run below command to import them into firbease ( Customize parameter based on your data format https://firebase.google.com/docs/cli/auth )

firebase auth:import users.json --hash-algo=SCRYPT --hash-key=key --salt-separator=salt --rounds=8 --mem-cost=14 --debug

Transfer users from MongoDB to firebase

1 Answers1