To change/reset your password please take a look on following link:
Changing your password is a two-step process.
1. Enter your e-mail address and you will receive a confirmation e-mail with a link with which you can change your password.
2. Click on the link and you'll get to an input mask for your new password. You'll have to enter your password twice to prevent typing mistakes.
After confirming of your input, your new password is active.