Wild Card redirect uri

Hi,

I am trying to follow this dropbox tutorial; but with success

https://blogs.dropbox.com/developers/2013/07/using-oauth-2-0-with-the-core-api/

I tried this call using the parameters shown and it worked, at least tried to redirect me to the localhost. But what does this mean? I simply want to be able to ask a user of app to grant dropbox permission to access a shared directory within their dropbox, so I need their bearer-id in calls my app makes to dropbox.

I setup my own authorisation key thru the dropbox, but what prey ask is a URI in this context? what can use as a redirect URL in this call, assuming I have no plans to set up a web server behind this; its an app that is making this call and I am more than happy to redirect users to dropbox if need be to get the credentials to continue?

https://www.dropbox.com/1/oauth2/authorize?client_id=<appkey>&response_type=code&redirect_uri=<redirect URI>&state=<CSRF token>

client_id I have?
redirect URI I don't have; I set it to https://localhost in my app, but it makes no sense?
CSRF token I can generate?

I am looking to do an “implicit grant” (for client-side apps like mobile or JavaScript apps). I don't want to have to try to implement Swifty API if I can avoid doing so since I want my code to be as simple as possible?