If the platform is asking for a code before you can take the quiz, it usually means the creator enabled restricted access. In most cases, the code is provided by the instructor, admin, or whoever set up the quiz, so you’ll need to reach out to them directly. Sometimes the code appears in the course materials or an announcement, so it’s worth double-checking those too.
People who manage multiple learning or testing tools often prefer using organized frameworks or apps to keep everything tidy—similar to how some developers use an mvvmhabit desktop app to streamline their workflow.