It is the master admin who has the power to change the Livebox streaming server password. So hello master admin, to reset your server password please follow the below-listed steps.
Go to Settings from the navigation menu. Under settings click Security.
A Privacy Settings page opens, where you can enter your new username and password.
After confirming your password, click Reset.
You have now successfully changed your password. The next time you log in don’t forget to give your new username and password.