title: WebAPI Authentication with access token and refresh token
body: <p>I have a ASP.NET MVC application using Forms Authentication against a custom database Users table. </p>
  
  <p>I need to add a series of Web API controllers for a mobile app to interact with the web application. </p>
  
  <p>For the authentication, i need to generate and access token and refresh token to return to the mobile app. How can I do that? </p>
  
  <p>Can anyone point me in the right direction of tutorial resources for this? There are a lot of unclear ones i already found. </p>