How to change Rustdesk Server key on Ubuntu

I did a fresh installation of Rustdesk on my Ubuntu Server.

I had a key:
Focn1GbvFJBfOWrHduUmrEifjVNtvVTFtc6QmQOt7TU=

Would it be possible to put this key back in so I wouldn't have to reconfigure all the devices again? And yes, how do I do this in Ubuntu, which command?