<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:soap1="http://www.surgient.com/50/VcsApi/SoapAdapter">
   <soap:Header/>
   <soap:Body>
      <soap1:Login>
         <soap1:organizationId>1</soap1:organizationId>
         <!--Optional:-->
         <soap1:userName>my_username</soap1:userName>
         <!--Optional:-->
         <soap1:password>my_password</soap1:password>
      </soap1:Login>
   </soap:Body>
</soap:Envelope>