All your credential save in directory specified in the argument token.path, after save every time you run any function from rym, rym_auth be load credentials from local file login.rymAuth.RData.
rym_auth create files for each your logins, which makes it possible use many yandex account in one script.
Every tokens expire after 1 year after authentication, but rym_auth automaticly refresh and save you credential 30 days before he expire.