I have written a test case where I attach an image and a parameter {"name":"xyz"} to body. But in controller, req.body remains null. Please look at the attached code below. Where am I making mistake ?

//test.spec.js

const chai = require('chai');
const fs = require('fs');
const chaiHttp = require('chai-http');
const app = require('../../../../src/index');
const { subid } = require('./common.helper');

const { expect } = chai;


chai.use(chaiHttp);

describe('Test for user endpoint', () => {
    describe('Test for POST route', () => {
        it('should return 201 and create user with single image upload', async () => {
            const res = await chai.request(app)
                .post("/posts/v1/create")
                .set("subid", subid)
                .field('email', 'myemail@gmail.com')
                .attach('multimedia', fs.readFileSync(`/home/shiveshk/Downloads/image-1.png`), 'image-1.png')
            expect(res.status).to.equal(201);
            console.log('RES', res.body.data)
        })
    })
})

// controller.js

exports.create = async (req, res, next) => {
  console.log("\n==> req.body : ",req.body);
};