Check if a user belongs to Do-Not-Email list
I was wondering if it's possible to check if a user is in `Do-Not-Email` list using the api.
I suggest two possible solutions:
1. Check if a user is in the list.
2. Get the list of users that are in the list.
I took a look at the api docs, but I found how I can move/remove a user to/from the list.
Thank you.