k6 API testing Lucky Framwork template

api.js

import http from 'k6/http';
import { check, group } from 'k6';

export let options = {
   stages: [
       { duration: '0.5m', target: 3 }, // simulate ramp-up of traffic from 1 to 3 virtual users over 0.5 minutes.
       { duration: '0.5m', target: 4}, // stay at 4 virtual users for 0.5 minutes
       { duration: '0.5m', target: 0 }, // ramp-down to 0 users
     ],
};

const URL = 'http://localhost:3000';

export default function () {
   group('API Login', () => {
      const headers = { 'Content-Type': 'application/json' };
      const data = {
        "user": {
          "email": "api@testing.com",
          "password": "testing"
        },
       };
       const response = http.post(`${URL}/api/sign_ins`, JSON.stringify(data), { headers: headers });
       check(response, {
           "status code should be 200": res => res.status === 200,
       });
   });
};