[REQUIRED] Environment info

firebase-tools: 8.14.0

Platform: macOS

[REQUIRED] Test case

firebase emulators:start --export-on-exit="./my-local-dump"

Then add a user to the Auth emulator then exit by sending a SIGINT.

firebase emulators:start --import="./my-local-dump"

Checking auth emulator again, we see the user we just created is gone.

[REQUIRED] Steps to reproduce

See above.

[REQUIRED] Expected behavior

Auth users added via the emulator are saved in the emulator export.

[REQUIRED] Actual behavior

The user is lost, it is not saved in the emulator export.