If you have forgotten your password you can reset it directly by clicking on the "Reset Password" button on the login landing page.
After that you will need to provide the email address for the account you wish to reset your password for.
A confirmation email will be sent to you email and direct you to a reset page.
If you wish to update your current password you can do it directly from the user profile settings menu after you have logged in.
Clicking on the profile icon and going into settings will take you directly to a password reset menu.
From there you will be able to update your current password to a new one.
If none of the previous options are available you can contact firstname.lastname@example.org for help to get a new one.