I'm in the same situation as you. I have created my own backend WebSocket to connect the JavaScript API of Guacamole with the guacd daemon. However, when implementing the SFTP function on the frontend, I obtained the object through onfilesystem, but how can I use this object to access files in the actual directory? I know this object has methods like createOutputStream and requestInputStream, but I've been trying for a long time without success. Plz Help Me!