private static String getGoogleAuthenticatorTokenRedisKey(final Integer otp) {
        return CAS_PREFIX + KEY_SEPARATOR + '*' + KEY_SEPARATOR + otp;
    }
This is {@link GoogleAuthenticatorRedisTokenRepository}.

@author Misagh Moayyed
@since 6.1.0
support/cas-server-support-gauth-redis/src/main/java/org/apereo/cas/gauth/token/GoogleAuthenticatorRedisTokenRepository.java