braze-preference-center Uses Liquid template language: https://www.braze.com/docs/user_guide/personalization_and_dynamic_content/liquid Braze preference center docs: https://www.braze.com/docs/api/endpoints/preference_center Diet Doctor get Braze preference center URL cloud function: https://github.com/dietdoctor/firebase-node-cloud-functions/blob/main/functions/controllers/brazePreferenceCenter.js