Don't worry if you forget your password. The password can easily be reset. On the login page, choose Glemt passord?/Forgot your password?, which will lead you to a new page where you need to enter the email address you are registered with in Moment. Follow the link sent to your email to reset your password.
Please note that your password is encrypted and not shown in plain text anywhere, even for us. This means that we unfortunately cannot help you remember a forgotten password. A password reset is the way to go.