Yeah, without the @ symbol (replying to your other comment).
If it's just spinning, it's because it's unable to connect to a steem node to verify that the key or password is legit. Could anything else be blocking your connection?
Another thing to try is a different node, and that same command outlined in the Github issue, would be to change https://wallet.steem.ws to https://rpc.buildteam.io or https://api.steemit.com.