private function prepareTokenHelper()
    {
        $this->tokenHelper->newSession(
            $this->contactClient,
            $this->contact,
            $this->payload,
            $this->campaign,
            $this->event
        );
        // Add any additional tokens here that are only needed for API payloads.
        $this->tokenHelper->addContext(
            [
                'api_date' => $this->tokenHelper->getDateFormatHelper()->format(new \DateTime()),
            ]
        );
    }