Based on the code you shared, it looks like you're using this third party dropbox-v2-api library. Since that's made by a third party, we can't provide support for it. You may wish to refer to the documentation for it or open an issue there for help using it.
Well, we know it can be hard to keep up good habits, so we made a new working from home cheat sheet, with some good habits, some things to avoid and some tips for making your day a little easier. Check it out here.
Work Smarter with Dropbox
The way we work is changing. Share and discover new ways to work smarter with Dropbox in our community.