Great article! I was wondering if you could add an extra section on why Async will make the @counter error go away. I'm new to Async and Threads in general and

Great article! I was wondering if you could add an extra section on why Async will make the @counter error go away. I'm new to Async and Threads in general and the rest of the article was super easy to follow but I didn't quite understand why or how that error would disappear.