<PixiGetCustomerListPost200TextXmlResponse>
  <CustKey>0</CustKey>
  <CustomerNrExternal>string</CustomerNrExternal>
  <OrderCount>0</OrderCount>
  <Turnover_all>0</Turnover_all>
  <ItemCount_all>0</ItemCount_all>
  <Turnover_avgPerOrder>0</Turnover_avgPerOrder>
  <ReturnCount>0</ReturnCount>
  <ReturnValue>0</ReturnValue>
  <ReminderLevel>0</ReminderLevel>
  <DaysSinceLastOrder>0</DaysSinceLastOrder>
  <DaysSinceFirstOrder>0</DaysSinceFirstOrder>
  <ShopID>string</ShopID>
  <EMail>string</EMail>
  <Salutation>string</Salutation>
  <Firstname>string</Firstname>
  <Lastname>string</Lastname>
  <Name>string</Name>
  <CareOf>string</CareOf>
  <Address>string</Address>
  <ZIP>string</ZIP>
  <Country>string</Country>
  <ShipLock>string</ShipLock>
  <BaseCurrency>string</BaseCurrency>
</PixiGetCustomerListPost200TextXmlResponse>

POST https://apigateway.descartes.com/tms/pixi/
Content-Type: text/xml; charset=utf-8
# echo -n '{{username}}:{{password}}' | base64 | pbcopy
Authorization: Basic {{token}}

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
                   xmlns:ns1="https://apigateway.descartes.com/tms/pixi/"
                   xmlns:xsd="http://www.w3.org/2001/XMLSchema"
                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                   SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
    <SOAP-ENV:Body>
        <ns1:pixiGetCustomerList>
            <StartCustKey xsi:type="xsd:integer"></StartCustKey>
        </ns1:pixiGetCustomerList>
    </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

<?php

getPixiSoapClientResponse('pixiGetCustomerList', [
    'StartCustKey' => '', // integer
]);

function getPixiSoapClientResponse(string $method, array $arguments = [])
{
    $soapArguments = [];
    foreach ($arguments as $key => $value) {
        $soapArguments[] = new SoapVar($value, null, '', '', $key);
    }

    $soapClient = new SoapClient(null, [
        'login' => '...',
        'password' => '...',
        'uri' => 'https://apigateway.descartes.com/tms/pixi/',
        'location' => 'https://apigateway.descartes.com/tms/pixi/',
    ]);

    return $soapClient->__call($method, $soapArguments);
}