<li class="list-group-item"><b>Name</b> is your human-readable name (to be shown on the leaderboard).
<li class="list-group-item"><b>ID</b> is used in the URLs for your repos (must be composed of lower-case letters, digits or hyphyns, must start with a lower-case letter).
<li class="list-group-item"><b>SSH public key</b> is needed if you want to access repos hosted on Gonito.net (usually it is <tt>.ssh/id_rsa.pub</tt> in your home directory after you generated private/public key pair).