    # File lib/fog/openstack/identity.rb, line 219
            def request(params)
              retried = false
              begin
                response = @connection.request(params.merge({
                  :headers  => {
                    'Content-Type' => 'application/json',
                    'Accept' => 'application/json',
                    'X-Auth-Token' => @auth_token
                  }.merge!(params[:headers] || {}),
                  :host     => @host,
                  :path     => "#{@path}/#{params[:path]}"#,
                  # Causes errors for some requests like tenants?limit=1
                  # :query    => ('ignore_awful_caching' << Time.now.to_i.to_s)
                }))
              rescue Excon::Errors::Unauthorized => error
                raise if retried
                retried = true

                @openstack_must_reauthenticate = true
                authenticate
                retry
              rescue Excon::Errors::HTTPStatusError => error
                raise case error
                when Excon::Errors::NotFound
                  Fog::Identity::OpenStack::NotFound.slurp(error)
                else
                  error
                end
              end
              unless response.body.empty?
                response.body = MultiJson.decode(response.body)
              end
              response
            end