To login in to the Criteo API, you must first call clientLogin. The result is an authentication token valid 48 hours after the time of creation.
The authToken, in conjunction with the appToken, must then be inserted in all others calls, in the SOAP header.
getAccount:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:v20="https://advertising.criteo.com/API/v201305">
<soapenv:Header>
<v20:apiHeader>
<v20:authToken>4574100083145240123</v20:authToken>
<v20:appToken>6198482927434260784</v20:appToken>
<v20:clientVersion>3.6</v20:clientVersion>
</v20:apiHeader>
</soapenv:Header>
<soapenv:Body>
<v20:getAccount/>
</soapenv:Body>
</soapenv:Envelope>