Added database

backend/database.php

+<?php
+    header("Access-Control-Allow-Origin: *");
+    header('Access-Control-Allow-Credentials: true');
+    header("Access-Control-Allow-Methods: PUT, GET, POST, DELETE");
+    header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
+    header("Content-Type: application/json; charset=UTF-8");
+
+    $db_host = 'localhost';                                 // Uncomment and assign values according to your system
+    $db_username = 'root';
+    $db_password = '';                                        
+    $db_name = 'ssl_database';                             // add name of your own databse from mysql phpmyadmin
+    $mysqli = new mysqli($db_host, $db_username, $db_password,$db_name);
+
+    if ($mysqli->connect_error) {
+    die('Error : ('. $mysqli->connect_errno .') '. $mysqli->connect_error);
+}
+?>
\ No newline at end of file

backend/users.sql

+-- phpMyAdmin SQL Dump
+-- version 5.0.2
+-- https://www.phpmyadmin.net/
+--
+-- Host: localhost
+-- Generation Time: Oct 28, 2020 at 02:33 AM
+-- Server version: 10.4.14-MariaDB
+-- PHP Version: 7.4.10
+
+SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
+START TRANSACTION;
+SET time_zone = "+00:00";
+
+
+/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
+/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
+/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
+/*!40101 SET NAMES utf8mb4 */;
+
+--
+-- Database: `ssl_database`
+--
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table `users`
+--
+
+CREATE TABLE `users` (
+  `id` int(11) NOT NULL,
+  `username` varchar(50) NOT NULL,
+  `name` varchar(50) DEFAULT NULL,
+  `password` varchar(255) DEFAULT NULL,
+  `email` varchar(255) DEFAULT NULL,
+  `img_url` text DEFAULT 'https://bain.design/wp-content/uploads/2014/08/People-Avatar-Set-Rectangular-12.jpg',
+  `n_attempts` int(11) NOT NULL DEFAULT 0,
+  `correct_timeline` text DEFAULT '[]',
+  `rating` int(11) NOT NULL DEFAULT 0
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+--
+-- Dumping data for table `users`
+--
+
+INSERT INTO `users` (`id`, `username`, `name`, `password`, `email`, `img_url`, `n_attempts`, `correct_timeline`, `rating`) VALUES
+(24, 'ayushjangir', 'Ayush Jangir', '$2y$10$VXSfup83ux6QKRIt4LPPZ.lAz7GbvN6yT/Tk5LH5eNKk1oussrwHm', 'jangirayush59@gmail.com', 'https://bain.design/wp-content/uploads/2014/08/People-Avatar-Set-Rectangular-12.jpg', 150, '[0,1,1,0,1,0,1,1,0,1,1,1,0,0,0,1,1,1,0,1,1,1,0,1,1,0,0,0,1,0,1,0,1,1,1,1,1,1,1,0,1,0,1,1,1,0,1,1,0,0,0,1,0,0,1,0,1,0,1,1,0,1,0,0,0,1,0,1,1,1,1,0,0,0,0,1,0,0,0,0,1,1,0,0,0,0,1,0,0,0,0,1,0,1,0,1,1,0,0,1,1,0,1,0,0,0,0,0,0,1,1,1,1,0,0,0,1,1,1,1,0,0,1,0,1,1,1,1,1,0,1,1,1,1,0,1,1,1,0,0,0,0,1,0,1,0,1,1,1,1]', 1278);
+
+--
+-- Indexes for dumped tables
+--
+
+--
+-- Indexes for table `users`
+--
+ALTER TABLE `users`
+  ADD PRIMARY KEY (`id`);
+
+--
+-- AUTO_INCREMENT for dumped tables
+--
+
+--
+-- AUTO_INCREMENT for table `users`
+--
+ALTER TABLE `users`
+  MODIFY `id` int(11) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=25;
+COMMIT;
+
+/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
+/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
+/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
\ No newline at end of file