First you will have to register your application on Dropbox. Check out the documentation for more information: https://www.dropbox.com/developers/apps.
Next configure a resource owner of type dropbox with appropriate
client_id, client_secret.
# config/packages/hwi_oauth.yaml
hwi_oauth:
resource_owners:
dropbox:
type: dropbox
client_id: <client_id>
client_secret: <client_secret>When you're done. Continue by configuring the security layer or go back to setup more resource owners.