auth

add mfa section #3894

Job	Run time
integration-tests	12m 33s
catalyst	4m 9s
quickstart	9m 19s
pod-lib-lint (FirebaseAuthInterop.podspec, ios, macos-12)	2m 37s
pod-lib-lint (FirebaseAuthInterop.podspec, ios, macos-13)	1m 53s
pod-lib-lint (FirebaseAuthInterop.podspec, tvos, macos-12)	2m 34s
pod-lib-lint (FirebaseAuthInterop.podspec, tvos, macos-13)	1m 55s
spm (iOS, macos-12)	4m 59s
pod-lib-lint (FirebaseAuthInterop.podspec, macos --skip-tests, macos-12)	2m 30s
spm (iOS, macos-13)	2m 50s
spm (tvOS, macos-12)	4m 13s
pod-lib-lint (FirebaseAuthInterop.podspec, macos --skip-tests, macos-13)	2m 20s
spm (tvOS, macos-13)	3m 43s
pod-lib-lint (FirebaseAuthInterop.podspec, watchos, macos-12)	1m 34s
spm (macOS, macos-12)	2m 53s
pod-lib-lint (FirebaseAuthInterop.podspec, watchos, macos-13)	1m 51s
spm (macOS, macos-13)	3m 17s
spm (catalyst, macos-12)	3m 22s
pod-lib-lint (FirebaseAuth.podspec, ios, macos-12)	3m 27s
pod-lib-lint (FirebaseAuth.podspec, ios, macos-13)	11m 55s
spm (catalyst, macos-13)	3m 4s
pod-lib-lint (FirebaseAuth.podspec, tvos, macos-12)	4m 53s
spm (watchOS, macos-12)	4m 50s
pod-lib-lint (FirebaseAuth.podspec, tvos, macos-13)	7m 51s
spm (watchOS, macos-13)	2m 25s
pod-lib-lint (FirebaseAuth.podspec, macos --skip-tests, macos-12)	6m 6s
pod-lib-lint (FirebaseAuth.podspec, macos --skip-tests, macos-13)	3m 55s
pod-lib-lint (FirebaseAuth.podspec, watchos, macos-12)	4m 23s
pod-lib-lint (FirebaseAuth.podspec, watchos, macos-13)	3m 50s
auth-cron-only	0s
	2h 5m 11s

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