How to get the actual network key?

Hello together,

i want to use my openhab-pi also for zigbee2mqtt (actually its on a seperate pi). As i read in the faq, i dont need to repair the devices if the network-key will be the same. The problem is that i didnt not define a key in the configuration.yaml, so i guess it will be some sort of random or a standard key. how can i get the acutal key out of the system?

Thank you very much!

Problem is solved. I have generated a new one for security reasons and paired devices again.