title: ASP.NET Identity : Prevent the user to Sign In without email confirmation
body: <p>Is there any built in way in ASP.NET Identity to prevent user to log in if he hadn't confirm his email?
  <br>
  Currently in my application I can create a new user and be able to sign in without confirming the email. Is there any configuration or something that I have missed or I need to manage this on my own?</p>