SetPasswordCallbackHandlerAuthenticationConfiguration only allows overriding of PasswordCallback, CredentialCallback and CredentialParameterCallback. For OTP I need to handle PasswordCallback and ParameterCallback, as part of one class.

SetCallbackHandlerAuthenticationConfiguration on the other hand seems to consider being the only callback, meaning for OTP I will not be able to reuse logic for handling the principal and the extended choice (added as ELY-274)