Adding ASP.NET Identity to existing project

I've been attempting to follow along with this tutorial on www.asp.net, on how to add ASP.NET Identity to an existing project.
One of the first steps involved adding Identity packages to my app. When I follow the steps, I'm unable to find a "Microsoft.AspNet.Identity.EntityFramework" package, or any other package that says "Microsoft.AspNet.Identity" in its title.
Has this package been removed?
Thank you.