There are two ways to implement this kind of Worker ID check feature:
In the remainder of this page, we give sample code for checking Worker IDs against a static list of IDs (method 2 above).
The following code can be added to your template or template skeleton:
The list of previous participants’ WorkerIDs go in the variable
previous, at the top of the code snippet above. The message which will be displayed to Workers who are in the list of known participants can be modified in the variable