Connect react native app with node js in local system

I am trying to connect my react native app with my node js app in the Windows system. Via Postman I am able to get response from node API, but getting undefined as response from react native app.

IPv4 Address :- 192.168.1.5

Node js / index.js file

require('./config/mongoose')
require('dotenv').config()

const app = require('./app')
const port = process.env.PORT

app.listen(8000, '192.168.1.5')

React native files

axios.js

import axios from 'axios';
import EncryptedStorage from 'react-native-encrypted-storage';

const axiosInstance = axios.create({
  baseURL: 'http://192.168.1.5:8000/api/',
  timeout: 10000,
  // headers: headers
});

axiosInstance.interceptors.response.use(
  function (response) {
    // nothing to do
  },
  function (error) {
    EncryptedStorage.removeItem('accessToken');
    EncryptedStorage.removeItem('user');
    axiosInstance.defaults.headers.common['Authorization'] = '';
    return Promise.reject(error);
  },
);

axiosInstance.defaults.headers.common['Content-Type'] = 'application/json';
axiosInstance.defaults.headers.common['Accept'] = 'application/json';

export default axiosInstance;

function that calls the api

const signIn = async (username: string, password: string) => {
    let token = null;
    let user = {};

    console.log(username +'--'+ password);   // data prints correctly

    await axiosInstance
        .post('login', {username, password})
        .then(response => {
            console.log(response);   // undefined
            let res = response.data;

            helpers.showToast(res.message);

            if (res.status) {
                // some other staff
            }
        })
        .catch(e => {
            helpers.showToast(e.message);
            console.log('Error Signin: ', e.message);
        });
};