How to fix the error “In order to use the Auth::routes() method, please install the Laravel/ui package” in Laravel

Error:

 message "In order to use the Auth::routes() method, please install the laravel/ui package"

I’m switching to Laravel 9 for my project. But when I attempted to launch php artisan, I received an error message.

To use the Auth::routes() method, please install the laravel/ui package.

I thus install the package, but I continue to receive the same issue. What could be the issue, and how do I resolve it?

RuntimeException
In order to use the Auth::routes() method, please install the laravel/ui package.

Solution:

Step 1: (Install Laravel UI)

composer require laravel/ui

Step 2: (Generate Auth UI)

php artisan ui bootstrap --auth