UserBuilder tests
requested to merge MggMuggins/users:counter/add_fn_new_to_user_and_group into counter/add_fn_new_to_user_and_group
I wrote two tests with what I'd like the API to look like, and showing how I'd like it to work. I'm pretty sure that they have no issues (at least no major ones, there may be some type mismatches but those are easy to fix). If you merge this request you can write the code for UserBuilder and once these tests pass, then I'll look over your code again. Don't change the tests! (at least not to do anything other than fix any type errors I may have missed). They are the way I want them, so modify your code.