So I've been trying to use the API as dynamic storage for my portfolio site. Essentially I want to be able to call a folder where I store photos and when the user loads the window for a particular project have it load the photos from a path that I've specified in a JSON object. I've mostly gotten the feature to run, the issue is my Access Token keeps expiring and I want to know if there is a way in Javascript to have a permanent token or to generate one without user interaction. (I'm using the JS SDK at the moment)