Help with soap(?)

Hi,
I have to interface with web service api ... and this is all I have
username
password
a url
and documentation that just looks like this ...
<soapenv:Envelope
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:v2="http://webservice.gekko-holding.com/v2_4">
<soapenv:Header/>
<soapenv:Body>
<v2:getBoardTypes>
<language>FR</language>
<identification clientId="test" password="test"/>
</v2:getBoardTypes>
</soapenv:Body>
</soapenv:Envelope>
----
I have used the http package to access other REST api's ,,, but I'm lost
here.
grateful for any pointers