Authentication in the blogging system

The authentication mechanism is the foundation required to support row-level security or multi-tenancy in the system, so we have to start building authentication in our application. There are various forms of authentication available, but we will be implementing cookie-based authentication in our blogging system.

The following code block will add cookie-based authentication as a service inside the ConfigureServices() method of Startup.cs:

    public void ConfigureServices(IServiceCollection services)
    { 
      // Code removed for brevity
      services.AddAuthentication(o =>
      {
        o.DefaultAuthenticateScheme = 
        CookieAuthenticationDefaults.AuthenticationScheme;
        o.DefaultChallengeScheme = 
        CookieAuthenticationDefaults.AuthenticationScheme;
     })
     .AddCookie();
    }

The configuration required...