Can't locate object method "params"

find_Bugzilla_params

The error:

Rohans-MacBook-Pro-164:Bugzilla rohandalvi$ perl test_email.pm 
Can't locate object method "params" via package "Bugzilla" at /Users/rohandalvi/Documents/open_source_stuff/bugzilla/bugzilla/Bugzilla/Mailer.pm line 33.

The module "Token.pm" makes use of the subroutine MessageToMTA to send email which I am trying to use here. . What am I doing wrong? Is this a import issue? However, In the code below, it uses the format MessageToMTA($message) without generating any error
Code from token.pm that also makes call to MessageToMTA subroutine in Mailer.pm

my ($token, $token_ts) = _create_token(undef, 'account', $login_name);

    $vars->{'email'} = $login_name . Bugzilla->params->{'emailsuffix'};
    $vars->{'expiration_ts'} = ctime($token_ts + MAX_TOKEN_AGE * 86400);
    $vars->{'token'} = $token;

    my $message;
    $template->process('account/email/request-new.txt.tmpl', $vars, \$message)
      || ThrowTemplateError($template->error());

    # In 99% of cases, the user getting the confirmation email is the same one
    # who made the request, and so it is reasonable to send the email in the same
    # language used to view the "Create a New Account" page (we cannot use their
    # user prefs as the user has no account yet!).
    MessageToMTA($message);

My code:

#! /usr/bin/perl -I/Users/rohandalvi/Documents/open_source_stuff/bugzilla/bugzilla
#s Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.

package Bugzilla::Mailer;

use 5.10.1;
use strict;
use warnings;

use Bugzilla::Mailer;


use Bugzilla::Constants;
use Bugzilla::Error;
use Bugzilla::Hook;
use Bugzilla::Util;

sub main{
  my ($msg, $send_now);
  MessageToMTA($msg => "Sample message", $send_now => 1);
}
main();


#end of code.

the file test_mail.pm is in the same directory as Bugzilla::Mailer.pm