[REQUIRED] Describe your environment

• Operating System version: Windows 8.1
• Browser version: Chrome v79
• Firebase SDK version: v7.7.0
• Firebase Product: auth, but it's probably similar to others

[REQUIRED] Describe the problem

The docs here describes the Error and the AuthError objects from firebase.auth, but they are not actually exported from the library.

Steps to reproduce:

• Import the firebase
• Try to find the auth enum error, created here:

Relevant Code:

I'm handling the errors from Firebase Auth with something like this:

.catch(err => {
	switch (err.code) {
		case 'auth/too-many-requests':
			...
			break;
		default:
			...
	}
})

... but it would be better if I got something like this:

.catch(err => {
	switch (err.code) {
		case firebase.auth.AuthError.TOO_MANY_ATTEMPTS_TRY_LATER:
			...
			break;
		default:
			...
	}
})

I know that's much more code, but I don't need care about how the codes are and don't need to keep rereading the docs to see other error codes that can happen, I would just let the autocomplete do it's work. It's more about allow us to use this code design too...