OWIN GoogleAuthentication - 始终显示"select account form"

Question

我启用了google认证:

    var googleOAuth2AuthenticationOptions = new GoogleOAuth2AuthenticationOptions
    {
        ClientId = "MYID",
        ClientSecret = "MYSECRET"
    };
    app.UseGoogleAuthentication(googleOAuth2AuthenticationOptions);

它工作得很好，但是当有人已经登录到谷歌，它不显示"选择帐户形式"为他。我怎么能强迫谷歌，显示"选择帐户形式"总是?

我读到设置prompt=select_account，但我不知道如何使用OWIN启用它

寻求帮助!

谢谢

Answer 1

根据另一个SO答案(链接)，您可以执行以下操作:

        app.UseGoogleAuthentication(new GoogleOAuth2AuthenticationOptions()
        {
            ClientId = "",
            ClientSecret = "",
            Provider = new GoogleOAuth2AuthenticationProvider()  { 
                OnApplyRedirect =  delegate(GoogleOAuth2ApplyRedirectContext context) {
                    string redirect  = context.RedirectUri;
                    redirect += "&prompt=select_account";
                    context.Response.Redirect(redirect);
                }
            }
        });