The StruxureOn web site https://struxureon.com/manage now uses two factor authentication that requires a password and a passcode.
If you don't have a password, click the reset your password link on https://struxureon.com/manage. Enter your email address to get an email with a link to add a password to your profile.
Once you log in to StruxureOn with your password, you'll get a text with a one-time passcode.
The login for the StruxureOn mobile apps has not changed.