Laravel 5.1:Read package's config file variables

I want to access the database connection details which are included in an external package's config file.

However, this does not seem to be working for me.

dd(Config::get('vendor/package::database.connection1.database')); 
// > null

The config file is called database.php and is imported via composer in the following path: vendor/package/config/database.phpm which looks like:

return [
        'connection1' => [
            'driver' => 'mysql',
            'host' => env('CONN1_HOST','SomeIPHere'),
            'port' => env('CONN1_PORT', '3306'),
            'database' => env('CONN1_DATABASE', 'db1'),
            'username' => env('CONN1_USERNAME', 'user1'),
            'password' => env('CONN1_PASSWORD', 'pass1'),
            'charset' => 'utf8',
            'collation' => 'utf8_unicode_ci',
            'prefix' => '',
            'strict' => false,
            'engine' => null,
        ],

         'connection2' => [
            'driver' => 'mysql',
            'host' => env('CONN2_HOST','SomeIPHere'),
            'port' => env('CONN2_PORT', '3306'),
            'database' => env('CONN2_DATABASE', 'db2'),
            'username' => env('CONN2_USERNAME', 'user2'),
            'password' => env('CONN2_PASSWORD', 'pass2'),
            'charset' => 'utf8',
            'collation' => 'utf8_unicode_ci',
            'prefix' => '',
            'strict' => false,
            'engine' => null,
        ],
];

What is the best way to get the value of ie connection1.database, given that the above way did not work? Is publishing it via php artisan vendor:publish essential?

via Chebli Mohamed