Nice, you managed to brake the first barrier.
Next, you would have to loop through all the users either in Postman or with a Python script.
The URL should be something like below (if Postman is used) where the variable is passed from a list/array with all the users in question, which you got from the previous command, GET.
L.E. sorry I cant give you more exact examples of what should be done, i'm struggling to get any results returned on my end