If needed, please ask clarification questions.
Please do following:
- Fork repository
- Change project code to make MultipleUsersTest pass
- Change project code to make AllQuestionsValidTest pass
- Refactor project code and tests to your liking and best effort . Focus on QuizController and QuizService.
- Write tests for QuizService and QuizController
- Prepare and submit pull request
Try to do every step as a separate commit.