Problem 06-unions, backdoor

[Shemrock3267]

Hey @mattpocock .
Thanks for your effort and time spent on this course.
I just want to point out that you can fool typechecker in this exercise with simply typing this, and it will pass the test.
role: string[] instead of role: 'admin' | 'user' | 'super-admin'

[mattpocock]

Thanks!

I'm not too interested on making every exercise exactly bulletproof. As I've said in other issues, the exercises will be accompanied by videos which make the intent of each problem/solution clear.