t.Run("case=fail token exchange if hook fails", func(t *testing.T) {
        run := func(strategy string) func(t *testing.T) {
            return func(t *testing.T) {
                hs := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
                    w.WriteHeader(http.StatusInternalServerError)