SignalR + Web Api 2承载令牌认证

Question

我有客户端应用程序，它在nodejs服务器上运行并具有Web Api项目。我在Startup.cs类中有Bearer Token Authentication：

        // Configure the application for OAuth based flow
        var oAuthOptions = new OAuthAuthorizationServerOptions
        {
            TokenEndpointPath = new PathString("/Token"),
            Provider = new ApplicationOAuthProvider(),
            AccessTokenExpireTimeSpan = TimeSpan.FromDays(1),
            AllowInsecureHttp = true
        };

        app.UseOAuthAuthorizationServer(oAuthOptions);

        app.UseOAuthBearerAuthentication(newOAuthBearerAuthenticationOptions());

我想在客户端启动集线器：

 $.connection.hub.url = 'https://localhost:44302/signalr/hubs';
 this.proxy = $.connection.chathub;

 this.proxy.client.onMessage = function (stock){
    };
       $.connection.hub.start()
         .done(function(error){})
         .fail(function(error){});

在客户端，我得到这样的令牌：

 $.post("https://localhost:44302/token", { grant_type: "password", username: user.username, password: user.password})
            .done(function (data) {
                if (data && data.access_token) {
                    bearerToken = data.access_token; 
                }
            })
            .fail(function (xhr) {
             error('Wrong password or username.');
            });

所以我在bearerToken中保存了令牌，但现在我怎么把它传递给服务器端呢？ 在这段代码中：

[HubName("chathub")]
public class ChatHub : Hub
{
    public override Task OnConnected()
    {
        if (Context.User.Identity.IsAuthenticated)
        {
            var identity = (ClaimsIdentity)Context.User.Identity;
  ...

IsAuthenticated为false，User中没有数据。