Laravel 5 - SQLSTATE[HY000][1045] Access denied for user 'root'@'localhost' (using password: NO)

I am trying to make CRUD operations in laravel and I alway have this error message. I already configured the .env and the config/database.php files to my local setting but it doesn't work.

I tried php artisan cache:clear,php artisan config:clear too...

My config/database.php:

'mysql' => [
        'driver' => 'mysql',
        'host' => env('DB_HOST', 'localhost'),
        'port' => env('DB_PORT', ''),
        'database' => env('DB_DATABASE', 'feki_test'),
        'username' => env('DB_USERNAME', 'root'),
        'password' => env('DB_PASSWORD', ''),
        'unix_socket' => env('DB_SOCKET', ''),
        'charset' => 'utf8mb4',
        'collation' => 'utf8mb4_unicode_ci',
        'prefix' => '',
        'strict' => true,
        'engine' => null,
    ],

My .env:

DB_CONNECTION=mysql
DB_HOST=localhost
DB_PORT=
DB_DATABASE=feki_test
DB_USERNAME=root
DB_PASSWORD=

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