I create auth with next code
app.UseFacebookAuthentication(new Microsoft.Owin.Security.Facebook.FacebookAuthenticationOptions()
{
AppId = "1058223614196813",
AppSecret = "dd208098e2cac42996581ba2bb59e5d1",
Scope = { "email" },
});
when I try get user email, logininfo return emain null
var loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync();
but user name show me. This code work fine some time.