I'm not really sure what your user object looks like so this make or may not work:

Instead of trying to populate the user object with an array, why not try passing the database output directly to it with a hashref? I've used this method on several projects:

my $query = "SELECT * FROM users WHERE user=?";
my $sth = $dbh->prepare($query);
$sth->execute($user) or die $sth->errstr();

# Here you have all the user's info in a hashref. The
# keys are the same as the database column names.
my $row = $sth->fetchrow_hashref();
# Then you could call the new method:
my $user_info = User->new($row);
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Then your user info new method basically could just bless the input

package User;

sub new {
     my($class,$user_info) = @_;
     return bless $user_info,$class;
}
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Hope that helps