Trying to generate a sitemap and uploading it to my current existing bucket in Amazon's S3, however, I'm getting 

```
Excon::Errors::Forbidden: Expected(200) <=> Actual(403 Forbidden)

```

This is my `sitemap.rb` file

```
SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.public_path = 'tmp/sitemaps/'
SitemapGenerator::Sitemap.sitemaps_host = "http://s3.amazonaws.com/#{ENV['S3_BUCKET_NAME']}/"
SitemapGenerator::Sitemap.create do
  add about_path
  add landing_index_path
  add new_user_session_path, priority: 0.0

  Trip.find_each do |trip|
    add trip_path(trip.slug), lastmod: trip.updated_at
  end
end

```

I have this in my `s3.rb` file

```
CarrierWave.configure do |config|
  config.storage = :fog
  config.fog_credentials = {
      :provider               => 'AWS',
      :aws_access_key_id      => Rails::AWS.config['access_key_id'],
      :aws_secret_access_key  => Rails::AWS.config['secret_access_key'],
      :region                 => 'us-east-1'
  }
  config.fog_directory  = Rails::AWS.config['bucket_name']
end

```

Would someone be able to know what the issue is with this?