These are stated in the first paragraph of the welcoming email. Until you change them, they're needed to authenticate everything from FTP, to Email access, C-Panel, and MS FrontPage if you're using it. In short, use this Username and Password for any access you're attempting to your account.
If you've just signed up to Starlight Site, chances are you've begun the process of a domain transfer to our servers. In all likelihood, it will take anywhere from 48 to 72 hours for all worldwide DNS records to reflect you domain name as pointing to our servers. While everything in our welcoming email refers to the domain you signed up, we recommended you use the accompanying "IP" number until you can verify your domain is actually answering to your new account on the Starlight Site servers.
The IP we've provided you will soon be registered to your domain name. Until such time as your domain is officially answering to our servers, you can use your new IP to access and setup your web site. For example, if your assigned IP was 22.214.171.124, your welcoming email would provide the URL http://126.96.36.199 as an option for accessing your new account. Again, it's a great way to test all those features and make sure everything is functioning smoothly before launching your web to the world.
1 Star and 2 Star account packages are IP-less
accounts. This means the IP is shared with several domains, as opposed
to being dedicated to "one." There are a couple of small differences
on how you access these accounts, and most notably how you access the
them before your domain name is officially pointing to our servers.
Instead of calling the account with a plain IP number, you call it with
an IP and "your associated Username." Both of these were sent
to you in your welcoming email. Let's try an example:
To access your C-Panel account manager, you
can login into it with: