API basic Message

Exemple : 
<?
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
  <s:Body>
    <GetSellerInformationResponse xmlns="http://www.cdiscount.com">
      <GetSellerInformationResult xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
        <ErrorMessage i:nil="true" xmlns="http://schemas.datacontract.org/2004/07/Cdiscount.Framework.Core.Communication.Messages"/>
        <OperationSuccess xmlns="http://schemas.datacontract.org/2004/07/Cdiscount.Framework.Core.Communication.Messages">true</OperationSuccess>
        <ErrorList/>
        <SellerLogin>login</SellerLogin>
        <TokenId>???</TokenId>
ServiceMessage.xml