Intergrating trello members onto a card through a Jotform field

I have intergrated Trello to my jotform so that it automatically creates a card.

Most fields that I have set up are carrying over correctly (title, date etc). I can't get the 'add members' field to work - how is this done please?

May you please provide us more details about the issue you'refacing? 

Please note that the Trello Power-Up app for JotForm will allow you the following options: 

If possible, please provide us some screenshots about it, this guide will help you uploading images here as the forum does not accept attachments via email responses: https://www.jotform.com/help/438-How-to-Post-Screenshots-to-Our-Support-Forum 

We will wait for your response. 

 Apologies for the misunderstanding, I was looking at the wrong Trello feature. 

I have been testing with a cloned form of yours and I was able to get it working, you need to display the user id, example: 

It correctly adds the member on the card upon the submission: 

May you please try doing this and let us know if it works? 

We will wait for your response. 

Thats great - thankyou - I have got this working now!