unable to get the output from /token in web API

Question

I am trying to generate the Token from the Owin. Below is the code of the Startup.cs

public void Configuration(IAppBuilder appBuilder)
{
        HttpConfiguration configuration = new HttpConfiguration();
        WebApiConfig.Register(configuration);
        appBuilder.UseCors(Microsoft.Owin.Cors.CorsOptions.AllowAll);
        appBuilder.UseWebApi(configuration);
    }
    public void ConfigureOAuth(IAppBuilder appBuilder)
    {
        OAuthAuthorizationServerOptions OAuthServerOptions = new OAuthAuthorizationServerOptions()
        {
            AllowInsecureHttp = true,
            TokenEndpointPath = new PathString("/token"),
            AccessTokenExpireTimeSpan = TimeSpan.FromDays(1),
            Provider = new SimpleAuthorizationServerProvider()
        };
        appBuilder.UseOAuthAuthorizationServer(OAuthServerOptions);
        appBuilder.UseOAuthBearerAuthentication(new OAuthBearerAuthenticationOptions());    
    }

When i am trying to generate the Token using the PostMan below is teh error what I am recieving. Please let me know what is the issue over here.

Answer 1

抱歉。发生代码错误，我忘记在Configuration（IAppBuilder appBuilder）中调用我的ConfigureOAuth（IAppBuilder appBuilder）方法