title: Get ApplicationUser from Partial View
body: <p>I have asked similar question about older MVC version and Membership, but those solutions don't work with Idendity and MVC 6. <br />
  I want to display user's first name inside _LoginPartial.cshtml file. So, instead of <code>"Hello " + User.Identity.GetUserName() + "!"</code> I want to access ApplicationUser.FirstName for the currently logged in user. What is the best way to do this?</p>