so how i did it is as follows,
fresh install of atlas server
create a .bat file with this command line
start C:\atlas\ShooterGame\Binaries\Win64\ShooterGameServer.exe Blackwood?ServerPassword=xxx?ServerAdminPassword=xxx?QueryPort=57560?Port=5760?MaxPlayers=12?ReservedPlayerSlots=0? -log -server -NoSeamlessServer -NoBattlEye
open ports on router
run it, then exit, go to the newly created folder named C:\atlas\ShooterGame\Saved\Config\WindowsServer and edit GameUserSettings.ini, down the bottom under SessionSetting SessionName=call this what you like
save/exit
run bat file again, then in the atlas game,
click, join new atlas, bottom left is a check box for show non atlas server, then search the name in the search feild