$ ./2.initialize.pl 
$VAR1 = bless( {
                 'my_sftp' => {
                                'username' => 'netcool',
                                'domain' => '202.123.43.17',
                                'password' => 'Hello@123'
                              }
               }, 'Config::Tiny' );

created /home/bob/Documents/html_template_data/5.example.ini
$ cat /home/bob/Documents/html_template_data/5.example.ini
[my_sftp]
domain=202.123.43.17
password=Hello@123
username=netcool
$ cat 2.initialize.pl 
#!/usr/bin/perl -w

######
## USER: start here.
## The values you will need to populate to create a proper ini file are here. 
## Change the ones you need to. You shouldn't have to change any of the 
## lexical perl. The most these example data will be is irrelevant.
######
use 5.011;
use Data::Dumper;
use Path::Tiny;
use Config::Tiny;

use constant {
  ENCODING => 'utf8'
};

my %config = (
  my_sftp => {
    domain   => '202.123.43.17',
    username => 'netcool',
    password => 'Hello@123',

  },

);
1;
my $ini_file = "5.example.ini";
my $ref_config = \%config;
my $ini_path = path( "/home/bob/Documents/html_template_data", $ini_file );
## USER      make path here^^^^^appropriate for your machine
my $ini = bless $ref_config, 'Config::Tiny';
say Dumper $ref_config;
# this will clobber any previous file of same name
$ini->write( $ini_path, ENCODING );
say 'created ', $ini_path;

__END__ 
$ 

##</code><code>##

$ ./3.sftp1.pl upload_file
ini path is /home/bob/Documents/html_template_data/5.example.ini
$VAR1 = bless( {
                 'my_sftp' => {
                                'password' => 'Hello@123',
                                'domain' => '202.123.43.17',
                                'username' => 'netcool'
                              }
               }, 'Config::Tiny' );

values are 202.123.43.17 netcool Hello@123
^C
$ cat 3.sftp1.pl 
#!/usr/bin/perl -w
use 5.011;
use Net::SFTP::Foreign;

my $upload_file = shift;
my $sftp = get_tiny();
my $server_dir = "perlmonks/scripts";
$sftp->mkdir("/$server_dir")  or warn "mkdir1 failed $!\n";
$sftp->setcwd("/$server_dir") or warn "setcwd1 failed $!\n";
$sftp->put($upload_file)        or warn "upload put failed $!\n";
my $remote_dir = $sftp->cwd;
say "remote dir is $remote_dir";
my $ls =  $sftp->ls( $remote_dir);
print "$_->{filename}\n" for (@$ls);
undef $sftp;

sub get_tiny {

  use 5.011;
  use warnings;
  use Net::SFTP::Foreign;
  use Config::Tiny;
  use Data::Dumper;

  my $ini_path = qw( /home/bob/Documents/html_template_data/5.example.ini );
  say "ini path is $ini_path";

  my $sub_hash = "my_sftp";
  my $Config   = Config::Tiny->new;
  $Config = Config::Tiny->read( $ini_path, 'utf8' );
  say Dumper $Config;
  # -> is optional between brackets
  my $domain   = $Config->{$sub_hash}{'domain'};
  my $username = $Config->{$sub_hash}{'username'};
  my $password = $Config->{$sub_hash}{'password'};

  #dial up the server

  say "values are $domain $username $password";
  my $sftp = Net::SFTP::Foreign->new(
    $domain,
    user     => $username,
    password => $password,

  ) or die "Can't connect: $!\n";
  return $sftp;
}

__END__ 

$