You login by stating the username and password you received by e-mail. The username is your e-mail address. If you have forgotten your password you can type in your e-mail address and click 'reset password' to receive a new password by e-mail.
If you want to change your password, you can do this after you have logged in.
When you login for the first time, you will be asked to fill in your name and mobile phone number.
Login: