owin.security

I am trying to setup my authentication using the authorization_code grant flow. I had it previously working with grant_type=password , so I kind of know how the stuff is supposed to work. But when using grant_type=authorization_code , I couldn't make it return anything other than invalid_grant Here is my setup: app.UseOAuthAuthorizationServer(new OAuthAuthorizationServerOptions { AllowInsecureHttp = true, TokenEndpointPath = new PathString("/auth/token"), AccessTokenExpireTimeSpan = TimeSpan.FromMinutes(5), Provider = new SampleAuthProvider() }); app.UseOAuthBearerAuthentication(new