Lumen first install - ReflectionException: Class redis does not exist - laravel

Question

I am playing around with Lumen, I installed it via Lumen installer. After I do composer install, I try to use artisan but it throws the following error:
ReflectionException: Class redis does not exist in Container.php on line 752
My composer.json:
"require": {
"php": ">=7",
"ext-pdo_pgsql": "*",
"ext-soap": "*",
"guzzlehttp/guzzle": "^6.3",
"laravel/lumen-framework": "5.5.*",
"laravel/tinker": "^1.0",
"vlucas/phpdotenv": "~2.2"
},
"require-dev": {
"barryvdh/laravel-ide-helper": "^2.4",
"doctrine/dbal": "^2.5"
},
Thanks in advance.

Answer 1

I had the same.
Solution:
composer require illuminate/redis
Register it in bootstrap/app.php by calling
$app->register(Illuminate\Redis\RedisServiceProvider::class);
in the file, under Register Service Providers.
From this aricle.

Answer 2

From Lumen's official documentation at https://lumen.laravel.com/docs/7.x/cache :
Redis Support:
Before using a Redis cache with Lumen, you will need to install the illuminate/redis package via Composer. Then, you should register the Illuminate\Redis\RedisServiceProvider in your bootstrap/app.php file:
$app->register(Illuminate\Redis\RedisServiceProvider::class);
If you have not called $app->withEloquent() in your bootstrap/app.php file, then you should call $app->configure('database'); in the bootstrap/app.php file to ensure the Redis database configuration is properly loaded.