adding user to mailchimp with Gibbon gem

gistfile1.txt

  def self.subscribe_user_batch(users)
    batch = users.map { |user| {EMAIL: user.email, FNAME: user.first_name, LNAME: user.last_name} }  
    Gibbon.batch_subscribe(:id => current_marketing_list['id'], :batch => batch)
  end

def self.current_marketing_list
Rails.env.production? ? bookshout_list_live : bookshout_list_test
end