You can reset your password using the Forgot Password option on the Sign-in page.
On the app, if you are signed into your account, you can update your password by navigating to the More tab, choosing Profile & Security, and then clicking Change Password. Save your password once you have filled in your new password.
On the website, if you are signed into your account, you can update your password by navigating to your account Profile & Settings, and then clicking Password. Save your password once you have filled in your new password.