If you are unable to login, you will need to send an e-mail to firstname.lastname@example.org
and ask for your password to be reset. I will need to change your password and e-mail you a new temporary password. If you are able to login, and just want to change your password...these steps will work as well.
after you login you should be able to change your password by going to
"user control panel" on the top right, then
click "profile" on the left, then
click "edit account settings" on the left, then
fill out your new passord and confirm the same password, then
enter the current password (the one I gave you if you needed admin to reset it), then
click "submit" at the bottom center.
Your new password should be updated now. Try logging out and back in with the new password to confirm it has been changed.