I like the concept of your casino, but the bad thing is you'll be hard or impossible to get a gambling license. This make people is hard to trust your sites since there're so many thing need to be answered in public.

1. How we can sure the user ID generated on your URL is safe? is there any way to verify it?
2. Can you add 2FA before user can log in with unique code generated/UID?
3. Your slogan Hack us you mean you're pretty sure your code is secured, but why you still faced a vulnerability in your casino?