Just started a server, How do I set who has admin privileges?

i would also like to know the answer to this

To become an admin, you can go to the SFTP tab of your 7D2D server and choose "Leave uploaded files intact" radiobutton. After that you can use SFTP to access the 7daysserver/Save/serveradmin.xml file and put in your steam ID under the "admin" section.

<admin steamID="YOURSTEAMID" permission_level="0" />