If you'd like to change your password, click the "Forgot Password" link where you sign in or use the instructions below.
If you want to choose a different password once signed in:
Click on your Profile Image in the upper right of the Home screen.
Then, from your profile page, find the 3rd box under your personal information. From the password section, click on "Reset Password". You will receive an email to your registered email address with instructions on how to update your password.