public void ConfigureAuth(IAppBuilder app)
{
app.SetDefaultSignInAsAuthenticationType(CookieAuthenticationDefaults.AuthenticationType);

app.UseCookieAuthentication(new CookieAuthenticationOptions());

app.UseOpenIdConnectAuthentication(
                new OpenIdConnectAuthenticationOptions
                {
                    ClientId = Config.ClientId,
                    ClientSecret = Config.ClientSecret,
                    Authority = Config.Authority,
                    PostLogoutRedirectUri = Config.PostLogoutRedirectUri,
                    RedirectUri = Config.PostLogoutRedirectUri,
                    Notifications = new OpenIdConnectAuthenticationNotifications()
                    {
                    }
                });
}