# File lib/fog/rackspace/networking_v2.rb, line 146
        def authenticate(options={})
          super({
                  :rackspace_api_key => @rackspace_api_key,
                  :rackspace_username => @rackspace_username,
                  :rackspace_auth_url => @rackspace_auth_url,
                  :connection_options => @connection_options
          })
        end