Asp.net mvc owin google auth与mvc5

我创建了一个新的mvc5标准项目。 我编辑了Startup.Auth.cs，添加了：

 app.UseGoogleAuthentication(new GoogleOAuth2AuthenticationOptions()
 {
      ClientId = "myClientCode.apps.googleusercontent.com",
      ClientSecret = "myClientSecret"
 });

和web.config添加：

 <location path="signin-google">
     <system.web>
          <authorization>
               <allow users="*" />
          </authorization>
     </system.web>
</location>

是空的

accounts.google.com生成的回调如下：

 http://localhost:58053/signin-google?state=K0Q6LHytGsRTpArK9TruwwzurLNbS4JeK30LEYhMmuaH9vmh3zQslFUA0dqByxftJlCBd6NhxyK12Co-2rKjBX711-WTfUNXKajPSKmpc7PiwwqBFwrnhMvUFh6f0b9iHTO4DU0EwBBBiYEDPkpvGsc--oTjTzzqf2qcpNLjScj9Hg6Obxm8tbHBcbO5CJcDxQtMWf8bOJ6bjVihqJwJ270Ps5SGfB9IRdxqJbVlIrM&code=4/tnXrYTNPuoTdZZmT29fWCWoE63_1HEa9g0lCrOi_vo8&authuser=1&session_state=3a5578d289d23d09dac97e705ebc613f4599f92b..d2d9&prompt=none

看起来还可以

你知道我可以使用owin检索帐户数据吗

HttpContext.GetOwinContext().Authentication.GetExternalLoginInfoAsync();

 http://localhost:58053/signin-google?state=K0Q6LHytGsRTpArK9TruwwzurLNbS4JeK30LEYhMmuaH9vmh3zQslFUA0dqByxftJlCBd6NhxyK12Co-2rKjBX711-WTfUNXKajPSKmpc7PiwwqBFwrnhMvUFh6f0b9iHTO4DU0EwBBBiYEDPkpvGsc--oTjTzzqf2qcpNLjScj9Hg6Obxm8tbHBcbO5CJcDxQtMWf8bOJ6bjVihqJwJ270Ps5SGfB9IRdxqJbVlIrM&code=4/tnXrYTNPuoTdZZmT29fWCWoE63_1HEa9g0lCrOi_vo8&authuser=1&session_state=3a5578d289d23d09dac97e705ebc613f4599f92b..d2d9&prompt=none