For getting the value, either there should be some link in the table row. Like below column :

You will create a link on this column, and in the event get the value like below example : Name is under a Link Widget. so its clickable.

For this link I have set OnClick event. In this event I am passing the UserId as input param.

Now in LinkOnClick, am passing this UserId to another screen. Where we can fetch the user details again using userid.

Please let me know if you are able to implement it.