I am trying to upload my contacts through the API, and I struggle to get the External Data Reference correct. If I upload data manually, the default name for that field is “External Data Reference”, but if I use that name programatically, it does not fill the column.
According to the reference, I should use the name “extRef”: api.qualtrics.com/bab13356ac724-create-transaction-contacts-import, but if I do that, I get an error message.
If I upload data and then download that same data again, the column of choice is actually called “extRef”
What is the correct naming (including capitalization, spaces, etc) to get this right?