How to authenticate mobile client against asp.net webapi portal with UseGoogleAuthentication enabled?

Question

Following this guide I have created asp.net mvc5 webapi portal with UseGoogleAuthentication enabled and trying to implement API usage by authenticated users only: https://db.tt/ncE1TlNi https://db.tt/8vRq1beS

Template generated by Visual Studio works fine and I can create accounts/authenticate but I didn't find any information on how should I implement same thing from the mobile client and call API as authenticated user (API intended for mobile authenticated users).

Thank you for any guides and suggests.

Answer 1

Read this article to understand OWIN security middleware. In mobile application you can retrieve access token from url fragment after authentication.