This is your lucky day.. just copy and paste this...
"Users"
{
//
// This is your users file
//
// You can use this file to add people as admins on your server
// Add them to the relevant section
//
// If you're a Lua coder you can add your own sections and use them
// in your script by doing pl:IsUserGroup( "admin" ) etc
//
"superadmin"
{
"dastronic" "STEAM_0:1:7099"
}
"admin"
{
}
}
OVER OVER OVER your current garrysmod/settings/user.txt
make sure you are doing this in your server's garrysbod/settings/user.txt not your clients filder.
PLEASE NOTE... you must change teh steam ID to yours. If you dont know how to find your steam ID.. go into a server and type status and your steam ID will be displayed.. this only works when you are connected to a multiplayer server, not single player.