在Web Api中，您需要读取Bearer令牌. 这里是关于整个主题的教程，但要点是在设置owin管道时在启动类中使用UseOAuthBearerAuthentication，这将在调用 RequestContext.Principal .

In Web Api, you need to read the Bearer Token. Here is a tutorial on the subject as a whole, but the gist of it is to use UseOAuthBearerAuthentication in your startup class when setup up the owin pipeline, this will enable access in controllers when calling RequestContext.Principal.

public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            ConfigureOAuth(app);
        //Rest of code is here;
        }

        public void ConfigureOAuth(IAppBuilder app)
        {
            OAuthAuthorizationServerOptions OAuthServerOptions = new OAuthAuthorizationServerOptions()
            {
                AllowInsecureHttp = true,
                TokenEndpointPath = new PathString("/token"),
                AccessTokenExpireTimeSpan = TimeSpan.FromDays(1),
                Provider = new SimpleAuthorizationServerProvider()
            };

            // Token Generation
            app.UseOAuthAuthorizationServer(OAuthServerOptions);
            app.UseOAuthBearerAuthentication(new OAuthBearerAuthenticationOptions());

        }
    }