Subclass Net::Twitter so it does the authentication.

lib/TwittElection/Twitter.pm

@@ -0,0 +1,45 @@
+package TwittElection::Twitter;
+
+use Moose;
+extends 'Net::Twitter';
+
+sub authorise {
+  my $self = shift;
+
+  my($access_token, $access_token_secret) = restore_tokens();
+
+  if ($access_token && $access_token_secret) {
+    $self->access_token($access_token);
+    $self->access_token_secret($access_token_secret);
+  }
+
+  unless ( $self->authorized ) {
+    # The client is not yet authorized: Do it now
+    print "Authorize this app at ", $self->get_authorization_url,
+          " and enter the PIN#\n";
+
+    my $pin = <STDIN>; # wait for input
+    chomp $pin;
+
+    my($access_token, $access_token_secret, $user_id, $screen_name) =
+      $self->request_access_token(verifier => $pin);
+    save_tokens($access_token, $access_token_secret); # if necessary
+  }
+}
+
+sub save_tokens {
+  my ($access_token, $access_token_secret) = @_;
+
+  open my $tw_fh, '>', '.te_tokens' or die $!;
+  print $tw_fh "$access_token $access_token_secret";
+}
+
+sub restore_tokens {
+  open my $tw_fh, '<', '.te_tokens' or die $!;
+
+  my $tokens = <$tw_fh>;
+
+  return split / /, $tokens;
+}
+
+1;