(Strapi 4)How to Use Auto-generated API from New Plugin Content-type?

I generated a new content type for my plugin and selected Yes to generate to bootstrap the api for it. I was give 3 files for services, controller, and router. But how do I invoke this? How do I make sure it’s even exposed?

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service:

/**
 *  service
 */

import { factories } from '@strapi/strapi';

export default factories.createCoreService('plugin::newsletters.newsletter');

controller:

/**
 *  controller
 */

import { factories } from '@strapi/strapi'

export default factories.createCoreController('plugin::newsletters.newsletter');

router:

/**
 *  router
 */

import { factories } from '@strapi/strapi';

export default factories.createCoreRouter('plugin::newsletters.newsletter');