Transfer registered users from one firebase app to another

Question

My firebase app has a list of registered users. These were created with Email & Password Authentication.

I want to transfer the firebase data and the list of users to another firebase app.

Transferring the firebase data is straightforward, but how can I transfer the registered users and keep their uid's?

Is this possible and if so, what is the best way to do it?

Answer 1

You should use the Firebase admin tools.

You may install the admin tools using this command:

npm install -g firebase-tools 

Export command, that generates the AllUsers.json file:

firebase auth:export AllUsers.json --project projectId 

On the other account use the following command to import the generated file.

firebase auth:import AllUsers.json --project projectId 

Answer 2

The answer above doesn't work by it self as all the passwords from the previous project will have different password hashes. You need to specify the old hash (exporting project) when you import the new users.

Click on this menu item and all of the settings you need for doing the firebase auth:import command will show up. Here's what I see:

hash_config {   algorithm: SCRYPT,   base64_signer_key: <long string of random characters>,   base64_salt_separator: <short string of random characters>,   rounds: 8,   mem_cost: 14, } 

I can then do the command successfully

firebase auth:import ./users.json --hash-algo=scrypt --rounds=8 --mem-cost=14 --hash-key=<long string of random characters> --salt-separator=<short string of random characters> 

How to set hash-key option for auth:import after default auth:export in firebase?