IF YOU FORGOT YOUR PASSWORD:
Click the Log in link in the upper right of your Community page
Click "I forgot my password"
Enter either your username or email address and press "Continue"
An email with instructions on how to proceed with resetting your password will be sent to the email address you specified when you created your account. The email will contain a password reset "token" that is valid for 72 hours only, so don't delay. If you do not get an email it may be because you did not enter a valid username or email.
Note that you are allowed only one password reset in a 24 hour period.