Well, in one respect, you just need to add the Nuget package and start writing code with it, but I think that you are probably talking about all the additional functions: pre-written code and samples for performing actions such as password reset, two-factor auth and etc.
There is no way to do this, in fact there is no easy way, at least in the sense of pressing a button and moving. I would recommend creating a new MVC 5 project with individual Auth and then adding the Identity Samples Nuget package to it . Then open an existing project in another Visual Studio window and copy / paste or use the sample code as a guide to write your own.
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