Environment info

firebase-tools: v9.21.0

Platform: macOS

Test case

Firebase Auth has to be enabled for the issue to appear, but apart from that the issue can be reproduced using the 3 steps below.

Steps to reproduce

1. Create a new user like this:

admin.auth().createUser({
  displayName: 'Foo\nBar'
});

2. Use the Firebase CLI to export all users to a file:

firebase auth:export ./accounts.csv --format CSV --project old-project

3. Use the Firebase CLI to import all users from the accounts.csv file:

firebase auth:import ./accounts.csv --project=new-project

Expected behavior

The exported users from Auth simply import to a different Firebase project using the CLI.

Actual behavior

I am getting the following error:
The import fails with an error like this:
Error: Line 2 (...) has invalid data format: Password hash should be base64 encoded.

After investigating the data a bit I noticed some interesting data regarding all name fields:
A user added via Google Login had a newline (\n) in their "Name" (column 6) and "Google Display Name" (column 10), which resulted in the CSV also including a line break!

So the accounts.csv looked something like this:
123123123,[email protected],true,passwordHash==,salt==,Foo
Bar,https://example.com/images.png,[email protected],Foo
Bar,https://example.com/images.png,,,,,,,,,,,,,1111,1111,,false,,

Because of this new line in the name fields, the resulting CSV is incorrect and the importer assumed that the second line was a new entry even though it still was connected to the previous user.