private static String getGoogleAuthenticatorTokenRedisKey(final String username) {
        return CAS_PREFIX + KEY_SEPARATOR + username.trim().toLowerCase(Locale.ENGLISH) + KEY_SEPARATOR + '*';
    }
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