I am using this request to get the credentials to the iSCSI disk 000001 for the virtual guest 000002:
GET /rest/v3.1/SoftLayer_Network_Storage_Iscsi/000001/getObject.json?objectMask=filteredMask[allowedVirtualGuests[allowedHost[credential]]]&objectFilter={"allowedVirtualGuests":{"id":000002}}
However, the result is the same as if I wouldn't apply the objectFilter part at all, resulting in the credentials for all virtual guests being returned, instead of the single one that I need.
What am I missing?