npm install sqlite3 --save, Cannot find module 'sqlite3'

[ravinaNG]

I have cloned the project from "https://github.com/hassanamin994/videowiki-test-task" and then started code in MVC style and I have installed MySQL, knex, express, body-parser, etc whatever is required but I am getting sqlite3 error.

don't understand why?

index.js

const app = express();
app.use(express.json());

const signUp = require('../routs/blogApp');
app.use('/signUp', signUp);

app.listen(6000, () =>{
    console.log('Now server is active...');
}); 

model one

const signUp = (data) => {
    return knex('user_details').insert(data);
};

module.exports = {signUp};

routs one

const router = express.Router();
// const jwt = require('jsonwebtoken');
const blogAppDB = require('../model/blogAppDB')

router.post('/signUp', (req, res) => {
    const data = {
        "user_name": req.body.user_name,
        "email_address": req.body.email_address,
        "password": req.body.password
    }
    const postedData = blogAppDB.signUp(data);
    postedData.then((resp) => {
        res.json(resp);
    })
    .catch((err) => {
        console.log(err);
        res.send(err);
    })
})

module.exports = router;

knexFile-

    client: 'mysql',
    connection: {
        host: 'localhost',
        user: 'root',
        password: 'myPassword',
        database: 'videowiki'
    }
});

module.exports = knex;

can anyone help me with this?