Artisan command "make:auth" is not defined in Laravel 6

Looks like L6 moves the Auth scaffolding into a separate package.

https://laravel.com/docs/6.0/authentication

Want to get started fast? Install the laravel/ui Composer package and run php artisan ui vue --auth in a fresh Laravel application.

Laravel 8.x

This command will create a new application with all of the authentication scaffolding compiled and installed:

laravel new kitetail --jet

Laravel's laravel/jetstream package provides a quick way to scaffold all of the routes and views you need for authentication using a few simple commands:

composer require laravel/jetstream

// Install Jetstream with the Livewire stack...
php artisan jetstream:install livewire

// Install Jetstream with the Inertia stack...
php artisan jetstream:install inertia

Github : laravel /jetstream

Official Documentation : Laravel Jetstream Documentation

Laravel 7.x

composer require laravel/ui --dev

php artisan ui vue --auth

Laravel 6.x

Laravel's laravel/ui package provides a quick way to scaffold all of the routes and views you need for authentication using a few simple commands:

composer require laravel/ui "^1.0" --dev

php artisan ui vue --auth

After above commands, you'll get following output :-

Vue scaffolding installed successfully.
Please run "npm install && npm run dev" to compile your fresh scaffolding.
Authentication scaffolding generated successfully.

Now after running this command run this command, for Vue scaffolding

npm install && npm run dev

If you're get following error message

npm ERR! Your cache folder contains root-owned files, due to a bug in
npm ERR! previous versions of npm which has since been addressed.
npm ERR! 
npm ERR! To permanently fix this problem, please run:
npm ERR!   sudo chown -R 1000:1000 "/home/shiv/.npm"
npm ERR! code EACCES
npm ERR! syscall open

Then give permission user to access .npm files from system

sudo chown -R 1000:1000 "/home/system_user_name/.npm"

As i now understood clearly,running "sudo command is dangerous for npm configurations"

Please look it this threat for more clear understanding :- npm throws error without sudo

In Laravel 6.0 make:auth no longer exists. Read more here

1 - First do this:

composer require laravel/ui

Note: Laravel UI Composer package is a new first-party package that extracts the UI portion of a Laravel project ( frontend scaffolding typically provided with previous releases of Laravel ) into a separate laravel/ui package. The separate package enables the Laravel team to update, develop and version UI scaffolding package separately from the primary framework and the main Laravel codebase.

2 - Then do this:

php artisan ui:auth

instead of

php artisan make:auth  ( which works for Laravel 5.8 and older versions )

It will generate the auth routes, a HomeController, auth views, and a app.blade.php layout file.

You can also generate the views only with:

php artisan ui:auth --views

The console command will prompt you to confirm overwriting auth files if you've already run the command before.

More Options here

// Generate basic scaffolding...
php artisan ui vue
php artisan ui react

and also:

// Generate login / registration scaffolding...
php artisan ui vue --auth
php artisan ui react --auth