Solved the total and grand total issue, the flash messages have a close button on them

Created a receipt page to show payment details

the grand_total doesn't work

user cannot access admin page

added password verify to login page

added an admin template

made corrections

minor changes in index.php

Updated several places

calculated the total which is paid in the checkout page

added homepage to nabvar

imported dotenv and to load to load environment variables

Modified the paypal gateway integration

Merge branch 'main' of https://github.com/Fathyy/shopping-cart-project

Used omnipay paypal rest api to integrate paypal