Register into HARPO
Enter your student number as your user name (note that it may start with an 'H' or 'K'). Then invent a good password. It is hashed before saving to the database, so if you forget it you will need to re-register. (In that case, your outputs will remain, but the new password will have one extra character.) The password must have at least 8 characters and at least one character from the following groups: lowercase, uppercase, number, special character. Do not use this password elsewhere.
You can do a re-registration to change a forgotten password. If you are registering for the first time, you must invent also a pseudonym for yourself. You cannot change it, so pick something you and others bother to see for a long time. You need not memorize it. You only need to recognize it in various listings, and you will see it in your profile, as well, but you never need to write it anywhere. Its purpose is to anonymize the listings, for instance the current scores of all students. The news tweets will also be fully public after every instance of the course. Your pseudonym must be of length 3–12 letters. Numbers are also allowed but not encouraged unless "readable" like in leetspeak. (The form allows you to input a new pseudonym at re-registration but in that case it is ignored.)