I don't understand how to create a route with Strapi 4

[Mimitip]

@Mimitip

'use strict';

const { createCoreController } = require('@strapi/strapi').factories;

module.exports = createCoreController('api::post.post', ({strapi}) => ({
    comments: async (ctx) => {
        return "Hello"
    }
}));

I noticed that “strapi” is not used in post.js in controller folder.