If you want to, you can reset your password from User Settings.
Click Reset Your Password
Click Send Email
You will receive a "Reset Password" e-mail.
Click the link in the email and it will lead you to a reset password page.
Enter a new password in both New Password and Matching Password.
Press Reset Password and your password will be changed.
The password must contain at least 8 characters, one number, and at least one capital letter.