ASP.Net身份:UseOAuthBearerTokens和UseCookieAuthentication之间的区别？

ASP.NET团队已经发布了新示例,展示了如何使用身份包.它们包含在以下nuget包中:Microsoft Asp.Net Identity Samples

这些示例非常有用,但是在发布的模板中最初的工作方式发生了很多变化.

我的具体问题:在原始SPA模板中,有以下代码:

        OAuthOptions = new OAuthAuthorizationServerOptions
        {
            TokenEndpointPath = new PathString("/Token"),
            Provider = new ApplicationOAuthProvider(PublicClientId, UserManagerFactory),
            AuthorizeEndpointPath = new PathString("/api/Account/ExternalLogin"),
            AccessTokenExpireTimeSpan = TimeSpan.FromDays(14),
            AllowInsecureHttp = true
        };
...
        // Enable the application to use bearer tokens to authenticate users
        app.UseOAuthBearerTokens(OAuthOptions);

但是在nuget包中的新样本中,该代码已经消失了,取而代之的是这段代码:

        app.UseCookieAuthentication(new CookieAuthenticationOptions
        {
            AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
            LoginPath = new PathString("/Account/Login"),
            Provider = new CookieAuthenticationProvider
            {
                // Enables the application to validate the security stamp when the user logs in.
                // This is a security feature which is used when you change a password or add an external login to your account.  
                OnValidateIdentity = SecurityStampValidator.OnValidateIdentity(validateInterval: TimeSpan.FromMinutes(30), regenerateIdentity: (manager, user) => user.GenerateUserIdentityAsync(manager))
            }
        });

任何人都可以帮助我理解app.UseOAuthBearerTokens和app.UseCookieAuthentication之间的区别(以及为什么要进行此更改)？它们似乎都允许应用程序以相同的方式运行,我可以对此更改使用一些说明.

谢谢...

-ben