Enhances events with metadata. Data can be managed in the Files tab in the UI or be uploaded as CSV or JSON files using the files endpoint.
|from||string||Yes||Specifies the source file.|
|include||[string]||No||Specifies fields to include, defaults to all|
|on||[string]||Yes||specifies which field(s) to join on; if passed as array the first is the field from the file, the second is from the event|
from is the unnamed parameter.
lookup rows from table “users.csv” where the ‘userid’ column equals the ‘id’ field of this event