https://restdocs.e-conomic.com
Call the Customers url /Customers
$appToken = 'demo';
$grant = 'demo';
$client = new Lenius\Economic\RestClient($appToken,$grant);
$parms = ['pagesize'=>100];
$response = $client->request->get('customers',$parms);
$status = $response->httpStatus();
if( $status == 200 ) {
// Successful request
$data = $response->asArray();
print_r($data);
}