We provide ONE way to change your password.
Go to the Sign In page and click on "Forgot my password". Type in the email address you used to create the account, and you will receive a unique, short-term link in an email to that account momentarily. We assume that if you have access to that email account, you are who you say you are. (It's how most web services operate today, so do NOT EVER let your email password get compromised because so many things now depend on it.)
Follow the directions in the password reset email.