setAccessKey($ak); $client->setSecretKey($sk); echo "\nDemo 1\n"; $response = $client->listUsers([]); echo $response; echo "\nDemo 2\n"; $response = $client->listUsers(['query'=>['Limit'=>10, 'Offset'=>0]]); echo $response; echo "\nDemo 3\n"; $response = $client->listUsers(['v4_credentials'=>['ak'=>"$ak", 'sk'=>$sk], 'query'=>['Limit'=>10, 'Offset'=>0]]); echo $response;