In README.md:
$config = array();
$config['client_id'] = 'YOUR_APP_ID';
$config['client_secret'] = 'YOUR_APP_SECRET';
$config['scope'] = 'read_station read_thermostat write_thermostat';
$client = new Netatmo\Clients\NAApiClient($config);
Shouldn't the last line be:
$client = new Netatmo\Clients\NAWSApiClient($config);