In order to access your Trust Room, go to the address https://collaboration.agora-secureware.ch and enter, in the login form, your username and password. In case your username is not an email address you are also asked to enter the name of your Trust Room.
If your account requires a two-factor authentication, you will be then asked to enter either a mobile TAN, sent to you by SMS, or a one-time password displayed on your mobile authentication App (like Google Authenticator, Duo, Authy or similar).