Not able to set multiple connections in laravel

I want to set multiple connections in Laravel application.

I tried using database.php is:

'default' => env('DB_CONNECTION', 'mysql'),
'connections' => [

    'mysql' => [
        'driver' => 'mysql',
        'host' => env('DB_HOST', 'localhost'),
        'port' => env('DB_PORT', '3306'),
        'database' => env('DB_DATABASE', 'reports_db'),
        'username' => env('DB_USERNAME', 'root'),
        'password' => env('DB_PASSWORD', 'pass'),
        'charset' => 'utf8',
        'collation' => 'utf8_unicode_ci',
        'prefix' => '',
        'strict' => false,
        'engine' => null,
    ],
     'mysql1' => [
        'driver' => 'mysql',
        'host' => env('DB_HOST', 'localhost'),
        'port' => env('DB_PORT', '3306'),
        'database' => env('DB_DATABASE', 'a2z'),
        'username' => env('DB_USERNAME', 'root'),
        'password' => env('DB_PASSWORD', 'root'),
        'charset' => 'utf8',
        'collation' => 'utf8_unicode_ci',
        'prefix' => '',
        'strict' => false,
        'engine' => null,
    ],
],

and .env

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=reports_db
DB_USERNAME=root
DB_PASSWORD=pass


CL_DB_CONNECTION=mysql1
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=a2z
DB_USERNAME=root
DB_PASSWORD=root

Inside controller

 public function index()
    {
        $ad= new Ad;

        $ad->setConnection('mysql1');
        $ad =  ad::get();
        echo $job;
      }

But I am not able to set up mysql1 connection.Can you please tell me how to achieve this?

via Chebli Mohamed