We're building an web app (asp.net) that should be accessible to partners only. The partners already have access to an extranet SharePoint site.
Here's the question:
Our app need to authenticate users (partners only). Would it be a good fit to make our web app an provided hosted app? Would we then get authentication for free?
We currently don't need to get any information from SharePoint, just authenticate the same set of users. The only info on the partner site in SharePoint would be a link to our app.
Would you say it's an overkill to go with a provider hosted app for this scenario?