Currently users are required to specify a directory for LND's macaroons with --lnd.macaroondir. This can be problematic or annoying if you aren't running Faraday on the same server that's running LND. I would suggest the ability to use a single macaroon (like admin.macaroon) to make it easy to use. Eventually once the macaroon baking changes land in LND we could even bake a macaroon specific for Faraday.