We provide free instruction how to configure Dropbox API Key and Dropbox API Secret
1. Go to https://www.dropbox.com/developers/apps
Click on the "Create app" button.
Choose an API - Dropbox API - Access to a single folder created specifically for your app
Choose the type of access you need: "App folder" field
Enter Name your app
Check "I agree to Dropbox API Terms and Conditions"
Click “Create app” button
Add "Redirect URIs": https://www.yoursite.com/module/MODULENAME/dropbox (WITH HTTPS)
"MODULENAME" - folder name with the module
and click "Add" button
Copy "App key"and "App secret"