Reported by @javiereguiluz on Slack:

VerifyAuthenticatorCredentialsEvent looks awfully long ... can it be renamed as VerifyCredentialsEvent?

I think we can - and should. At first, we put the word "authenticator" in any class we made to distinguish between "old" and "new" security classes. However, the final PR introduced many classes without "authenticator" and VerifyCredentialsEvent is not similar to any existing class.