C# Track - Possible improvement to Authentication System tests

@ErikSchierboom I was looking at open issues in the track, specifically issue 2055 about Authentication System. That issue can be closed, the problem cannot be reproduced and most likely have been a user error. We cannot confirm this as the github user has been deleted.

However, I noticed a strange user experience with the tests that perhaps I could improve on. The initial code passes all the tests (it is a refactoring exercise) and it is possible to submit the code without any changes and mark the exercise as complete. Would you be open to a pull request that more thoroughly tests the expected changes have been implemented?

Yeah absolutely!