Check FBS-Accounts.nut, line 18.
// If they are, check the last known IP, if it's the same as the current player IP, auto log them in
if ( ip == AccountIP )
{
MessagePlayer( "You were auto-logged in! Level - " + Level, player );
hsh_LoggedIn.Add( name, 1 );
}
CTRL-F is a useful tool.