This event occurs once per Pull, once all information (including documents) is available.
Webhook Request Format
The webhook is a POST request with a JSON body that will look like the following:
{
"widget_id": "<WIDGET_ID>",
"pull_id": "<PULL_ID>",
"status": "SUCCESS",
"meta_data": {... developer-supplied JSON-serializable metadata ...},
"event_type": "COMPLETE",
"data": {}
}