The request data is sent as an additional input parameter:

ParameterTypeValue
referenceascii[A-Z0-9]{1,32}
Unique reference identifying the merchant

Example Request

curl --cacert rootCA.pem --key partner.key --cert partner.pem -d
"login=ppropartner&password=p1&reference=MERCHANT0001"
https://boardingapi.girogate.de/promotetoplatform