[FR] Add UpdateCurrentUser method

[marcusx2]

[READ] Guidelines

When filing a feature request please make sure the issue title starts with "[FR]".

Feature proposal

• Firebase Component: Auth

Describe your use case and/or feature request here.

Add https://firebase.google.com/docs/reference/js/v8/firebase.auth.Auth#updatecurrentuser to the unity firebase sdk. This is useful to switch users without forcing the user to sign in again...

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[paulinon]

Hi @marcusx2,

Thanks for filing this. Having this function would be helpful so that it could be used by Unity developers. I'll let the team know about this. You may refer to this thread for any updates.