Bjorn Spruijt

Hi! I have a similar situation as Ashley. I want to add the users external_id to a custom field (customer no). The updating of the custom field (customer no) with the solution in this thread works great, but how do I get the users external_id into the custom fields 'value' in the JSON? Any help would be very much appreciated!

{
    "ticket": {
        "custom_fields": [
            {
                "id": 360020980097,
                "value": Here I need to pass the users external_id...but how?
            }
        ]
    }
}