How to use old laravel new project-name --auth in Laravel 8 Step by Step
If you want to upgrade your application to Laravel 8 from the previous version, then you don't need to replace the code of your authentication instead you just update the package to " laravel/ui to ^3.0 " and follow the upgrade instructions given in the below link
https://laravel.com/docs/8.x/upgrade#...
https://github.com/laravel/ui
Steps
1) Upgrade the Laravel installer to version 4
you can check using the command: laravel -v
for upgrading to the latest version: composer global update laravel/installer
2) Install a new Laravel 8 application using the laravel command: laravel new project-name
3)Install Laravel UI package using: composer require laravel/ui
if you are upgrading from the previous version
Update the following dependencies in your composer.json file:
guzzlehttp/guzzle to ^7.0.1
facade/ignition to ^2.3.6
laravel/framework to ^8.0
laravel/ui to ^3.0
nunomaduro/collision to ^5.0
phpunit/phpunit to ^9.0
4) Run the following command to generate authentication scaffolding:npm install && npm run dev
5) Goto the .env file of your application and setup the database
6) Next, apply migration using the command: php artisan migrate
7)Start the development server: php artisan serve
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