Create whitelist exempt target

curl -X POST https://api.box.com/2.0/collaboration_whitelist_exempt_targets \
     -H 'Authorization: Bearer <ACCESS_TOKEN>'
     -H 'Content-Type: application/json" '
     -d '{
       "user": {
         "id": "23522323"
       }
     }'

string userId = "22222";
BoxCollaborationWhitelistTargetEntry exemptUser = await client.CollaborationWhitelistManager
    .AddCollaborationWhitelistExemptUserAsync(userId);

String userID = "12345";
BoxCollaborationWhitelistExemptTarget.create(api, userID);

user = client.user(user_id='11111')
exemption = client.collaboration_whitelist().add_exemption(user)

client.collaborationWhitelist.addExemption('5678', callback);