def initialize(options={})
require 'multi_json'
@rackspace_api_key = options[:rackspace_api_key]
@rackspace_username = options[:rackspace_username]
@rackspace_auth_url = options[:rackspace_auth_url]
@connection_options = options[:connection_options] || {}
uri = URI.parse(options[:rackspace_dns_endpoint] || US_ENDPOINT)
@auth_token, @account_id = *authenticate
@persistent = options[:persistent] || false
@path = "#{uri.path}/#{@account_id}"
@connection_options[:headers] ||= {}
@connection_options[:headers].merge!({ 'Content-Type' => 'application/json', 'X-Auth-Token' => @auth_token })
@connection = Fog::Connection.new(uri.to_s, @persistent, @connection_options)
end