I've used the web dashboard of Elastic Beanstalk to make an application and an environment. I know I can update that using the dashboard and uploading a zip file of my application, but I would rather use the command line to upload my application.
Apparently the correct tool for this is eb, the CLI for Elastic Beanstalk. I've installed this and attempted to use it, following the Amazon "Deploying a Flask Application to AWS Elastic Beanstalk" tutorial. However, this seems to create a completely different application to the one visible on the EB dashboard - changes made to it don't appear on the dashboard, and the application even has a different URL.
How can I use the command line to access an existing application on AWS Elastic Beanstalk?