<soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:Magento">
   <soapenv:Header/>
   <soapenv:Body>
      <urn:login soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
         <username xsi:type="xsd:string">?</username>
         <apiKey xsi:type="xsd:string">?</apiKey>
      </urn:login>
   </soapenv:Body>
</soapenv:Envelope>