use strict;

my %passwd;
while (<DATA>) {
   my ($id,$email,$user,$passwd) = split;
   $passwd{$user} = {
      id     => $id,
      email  => $email,
      passwd => $passwd,
   };
}

my @other_array = @ARGV[0,1];

my $user = $passwd{$other_array[0]} || die "bad user";
die "bad password" unless $other_array[1] eq $user->{passwd};

__DATA__
1028804576 nasa@dodo.com.au name password
1028804590 nasa@dodo.com.au name2 pass2
1028804598 who@where.com again anouther

##</code><code>##

use strict;
use DBI;

my $dbh = DBI->connect(
   "DBI:CSV:f_dir=.;csv_eol=\n;csv_sep_char= ;",
   {RaiseError=>1},
);

$dbh->{csv_tables}->{'users'} = { 
   file      => 'users.csv',
   col_names => [qw(id email user passwd)],
};

my $user = shift;
my $pass = shift;

my $sth = $dbh->prepare("
   select id,email,user,passwd 
   from users
   where user = ?
   and passwd = ?
");
$sth->execute($user,$pass);

my $valid = $sth->fetchrow_hashref;
die "bad user/pass" unless $valid;

my $id    = $valid->{id};
my $email = $valid->{email};