Be sure you go to "steempeak.com" not "steampeak.com", the second one is a domain that's for sale.

I figured out what I needed to log in. You use your same username (sunlit7), but use your "Active private key" or "owner private key" as your password.

If you are logged in to "steemit.com" with the owner key, you can see your other keys on your "wallet" page under the "permissions" tab, you have to click on the button to show private key. When you first signed up the owner key is what you were given but you might have thought of it as the password for steemit. You can use it as a password, but it's the owner key.

This year old post from @drakos helped me start to get it, maybe it will help you. https://steemit.com/steemit/@drakos/steem-private-and-public-keys-demystified