Deploy in google appengine

/bin/ -A --oauth2 update appinventor/appengine/build/war
In this above command, what is referred as appengine-sdk folder to deploy??, how to install it?

the command is,
your-appengine-sdk-folder/bin/ -A --oauth2 update appinventor/appengine/build/war is deprecated and no longer used for a deployment to Google App Engine. You need to switch to using gcloud app deploy instead. Consider going through the Google App Engine tutorial first to get your account set up with a simple app and then deploy your App Inventor code once you have that working.