title: Google authentication in ASP.NET Core without ASP.NET Identity
body: <p>Is it any way to implement authentication via Google in ASP.Net core without ASP.NET Identity?
  I have implemented authentication based on cookies like this:</p>
  
  <p><a href="https://docs.microsoft.com/en-us/aspnet/core/security/authentication/cookie?tabs=aspnetcore2x" rel="nofollow noreferrer">https://docs.microsoft.com/en-us/aspnet/core/security/authentication/cookie?tabs=aspnetcore2x</a></p>
  
  <p>And I need to add Google authentication to project.</p>