I have a simple CRUD application that allows users to register and log in There is a registration endpoint in General.js, this works fine and the login prints

"message": "Invalid login. Please check username and password"

- index.js
- router
- - general.js
- - auth_users.js
- - booksdb.js

Register on Postman

When I log into the endpoint in auth_users.js

This is the login code of auth_users.js. It has a login endpoint, which is mainly the express function responsible for login. regd_users.post()

const express = require('express');
const jwt = require('jsonwebtoken');
let books = require("./booksdb.js");
const regd_users = express.Router();

let users = [];

const isValid = (username)=>{ //returns boolean
//write code to check is the username is valid
let userswithsamename = users.filter((user)=>{
    return user.username === username
  });
  if(userswithsamename.length > 0){
    return true;
  } else {
    return false;
  }
}

const authenticatedUser = (username,password)=>{ //returns boolean
//write code to check if username and password match the one we have in records.
let validusers = users.filter((user)=>{
    return (users.username === username &&users.password === password)
  });
  if(validusers.length > 0){
    return true;
  } else {
    return false;
  }
}
 
//only registered users can login
regd_users.post("/login", (req,res) => {

    const username = req.query.username;
    const password = req.query.password;
    if (!username || !password) {
        return res.status(404).json({message: "Error logging in"});
    }
    if (authenticatedUser(username,password)) {
      let accessToken = jwt.sign({
        data: password
      }, 'access', { expiresIn: 60 * 60 });
      req.session.authorization = {
        accessToken,username
    }
    return res.status(200).send("User successfully logged in");
    } else {
      return res.status(208).json({message: "Invalid Login. Check username and password"});
}
});

// Add a book review
regd_users.put("/auth/review/:isbn", (req, res) => {
  //Write your code here
  return res.status(300).json({message: "Yet to be implemented"});
});

module.exports.authenticated = regd_users;
module.exports.isValid = isValid;
module.exports.users = users;