Add phone number to Signer for SMS authentication besides withSmsSentTo()?

Hey, I am looking to include SMS authentication for a signer by first creating an authentication object and then including it in the constructor for the Signer object. I have been able to do this with the Q&A authentication as follows: Authentication auth = ChallengeBuilder.firstQuestion("What is your favorite sports team?") .answer(qaAnswer) .build(); Signer signer = new Signer(email, firstName, lastName, auth); signer.setId(id); signer.setCompany(company); signer.setPlaceholderName(placeholderName); return signer; HOWEVER, for SMS authentication, I do not see anyway to set the phone number using SMSAuthenticationBuilder or setting it on the Signer object. The only way I have been able to get the SMS authentication to work is by using the SignerBuilder: Signer signer = SignerBuilder.newSignerWithEmail(email) .withFirstName(firstName) .withLastName(lastName) .withSmsSentTo(phoneNumber) .build(); signer.setId(id); signer.setCompany(company); signer.setPlaceholderName(placeholderName); Is there someway to set the phone number for the SMS Authetnication method besides the withSmsSentTo() function? I looking to make our authentication method generation more dynamic and this would be a big help. Thanks! FYI, I am using Java SDK version 11.