As I had some questions why you cannot mine directly with your wallet as username on suprnova:

Suprnova uses a different backend for the pool than the others. You need to create an account first by signing up and add workers as described in https://scash.suprnova.cc/index.php?page=gettingstarted

It's a one time registration, you just need an email and you then have for example idle worker notifications etc when your rigs go down, you can payout Everytime you wish etc.. it's simply different

I hope the link above to the getting started instructions will be linked at the op

scash already on tradesatoshi, so you can mine directly to exchange wallet.
we set a minimum 100 scash payout on Nibirupool, so that you will not have problems with small transfers to exchange.

p.s. US and EU stratums available, choose one  which is closer to you
https://scash.nibirupool.com/getting_started