To add admins edit the file /Dragons/Saved/Config/WindowsServer/Game.ini using the FTP Manager and copy/paste the below.
[/Game/Dev/Libraries/Classes/Runtime/DragonsGameInstance.DragonsGameInstance_C]
iServerMaxPlayers=20
bServerUseJoinList=false
sServerAdmins=76561198010862597
If you would like to add additional admins add another line
sServerAdmins=1234567890987654321
