In this blog post we show you how to implement an OAuth authorization code grant flow using Node.JS and Dropbox JavaScript SDK that works with multiple users.  The code presented here is for a development environment, as you need to carefully implement security measures not considered in this blog post when using a production environment. 

We will walk you through the configuration of a Dropbox application, installing and configuring the libraries needed for the project, and finally the code implementation that supports the OAuth authorization code grant flow using JavaScript. If you are unfamiliar with OAuth,