Issue Summary:

Currently we only allow one callback URL in developer console for an app. It would be good to allow multiple callback URLs.

Use cases include

• Use 3 different apps one for live, one for a staging environment and a third for local testing and have just one app that has multiple call back urls.
• Add a URL at runtime or something like a wildcard URL so the callback redirects to the correct tenant at runtime 
• The app platform is distributed across multiple domains which can be accessed via {region}.mydomain.com depending on the user’s location

Workaround

It's provide some data in the state parameter, that can be decoded and then do a redirect to the required destination.