Click on ⚙️ Settings and go to the My Team
Click on your user name/e-mail (or on the Billdu website in the upper right corner click on your user name/e-mail)
A new screen appears
Your role is set as an Owner or Employee
Now you can alter your user name or e-mail address
PASSWORD AND SIGNATURE
Your password can be changed on the website
You can add a signature which will appear on your invoice