First, please note that you only need a single account. If you own one already, please sign in. If you need a different username, you can simply create additional profiles! Please contact us if you are having trouble.
Please chose your account name carefully, since you will not be able to change it later. You will then be able to create profiles under pseudonymes.
Please (please!) use a decent password and memorize it. We do not wish to collect data on who you are. That also means it is dificult for us to verify who you are and reset your password in case you forget it.