Due to some recent security issues (announced here: https://forum.supercell.com/showthread.php/1392034), we have been forced to reset passwords to keep your account safe. The reset only applies to users who have not yet changed their passwords. In order for you to be able to login, please request a new password from this link: https://forum.supercell.com/login.php?do=lostpw
Note that the email you will have to enter has to be the same one you used when you signed up to the forums, or a one which you have later on changed to in your settings.
Thank you for your continuous support and we are very sorry for the inconvenience!