isRegistrationConfirmation example

return \call_user_func($this->inner, $request, $options);
        }

        if ($this->isRegistration($request)) {
            $this->registrationRequest = $request;
            $promise = new Promise();
            $promise->resolve(new Response(200, [], $this->buildAppResponse($request)));

            return $promise;
        }

        if ($this->isRegistrationConfirmation($request)) {
            $this->confirmationRequest = $request;
            $promise = new Promise();
            $promise->resolve(new Response(200));

            return $promise;
        }

        return \call_user_func($this->inner, $request, $options);
    }

    public function didRegister(): bool
    {