Hey Chris. I'm not a Java developer either, but I did some digging on this so I'm going for educated guess. I grabbed a copy of the sample project and it looks like your ???? should be replaced with a property from the TsResponse.java object. I'm basing this off of the sample for querying Projects. In TsResponse there is a property for getProjects that returns a model of ProjectListType. So for your query, you'll need to create a new model, GroupUserListType for example, and then add a property in TsResponse. Be a safe bet that you will also need a Set function as well in TsResponse. Hope this helps.