There’s info on that here, on our Support site. We unfortunately can’t help with that via these forums. If you log into the account on the website, do you get a message about suspension? In the meantime, you could try using a different user and app ID with your code?
That’s annoying, and I can only apologise for that. My guess is that you repeatedly disconnected and reconnected earlier on in your development cycle, and that got marked as a problem. To be honest, I’ve got myself into this situation before! There’s some guidance here about how to exponentially back-off.