With OS version 3.1.0 Control4 Zigbee Controller devices (and others) no longer have the default password for the root user. By following this article you will be able to setup a new SSH user to use to unlock the controller in Domotz or to use Domotz Custom Drivers.
1. Open the Composer Pro software and from the menu click on Tools → Network Tools:

Navigating Network Tools in Composer Pro
1. Open the Composer Pro application and navigate to the menu bar at the top of the screen.
2. Click on the "Tools" menu to display a dropdown list.
3. From the dropdown, select "Network Tools" to access network-related functions.
4. In the main window, locate the box to create a new project under "Lighting Defaults."
5. Enter necessary details such as City, State, and Country, using the "Lookup" button for assistance.
6. Adjust the "Date" and "Time" settings, choosing the display format if needed.
7. Set the "Timezone" by selecting "Edit" and choose the desired setting.
8. Confirm "Push Settings from Project" if applicable by checking the box.
9. Choose the preferred "Locale" from the dropdown menu and click "Set."
10. Set "Temperature" by selecting either "Fahrenheit" or "Celsius."
3. On the zigbee controller device right click –> Terminal

Accessing the Terminal for a Device in VirtualBox Composer Pro
1. Navigate to the "Connections" section on the left sidebar.
2. Click on "IP Network" under the Network tab.
3. In the "IP Network Connections" panel, locate the device list.
4. Select the device labeled "EA-3" from the list.
5. Right-click to open the context menu and choose "Terminal."
6. Use this option to open a terminal session for the selected device to execute commands directly.
4. Once the terminal is opened enter the following command:
adduser [choose an appropriate ssh username]

Adding a New User in a Network Console
1. Open the virtual machine window to access the main interface.
2. Navigate to "Connections" and select "IP Network Connections."
3. Review the list of devices with details such as device name, room, type, address type, address, and IP address.
4. Select a device from the list to interact with its console.
5. In the console window, enter the command `adduser nameOfNewUser` to create a new user. Replace "nameOfNewUser" with the desired username.
6. Ensure the console confirms the action before proceeding with additional commands.
5. Enter twice the ssh password for that user
6. The new user is now created and you can attempt to enter these username and password on Domotz