def show(params={})
      key = params.delete(:key)
      Zcloudjp::Client.get("/machines/#{machine.id}/metadata/#{key}", machine.request_options)
    end
def show(params={})
      key = params.delete(:key)
      Zcloudjp::Client.get("/machines/#{machine.id}/metadata/#{key}", machine.request_options)
    end
GET /machines/:id/metadata/:key.:format