sub read_passfile {
    my $file_name = shift; #Pass the file name to the routine
    my @temp;
    my %passfile = ();
    open (PF, $file_name) or die "Couldn't read password file: $!";

    while (<PF>) {
        chomp;
        @temp = split("\t", $_);
        $passfile{ $temp[0] } = $temp[1];
    }
    close PF;
    return %passfile;
}