Unable to add Horizon command

It seems not to be possible to add Horizon commands like this:
```
return [
    'commands' => [
        \Laravel\Horizon\Console\PauseCommand::class,
        \Laravel\Horizon\Console\ContinueCommand::class,
    ],
    'auth' => [
        env('CLIENT_ARTISAN_REMOTE_API_KEY') => ['*'],
    ],
    'route_prefix' => 'artisan-remote',
];
```

Or am I missing something?
