sentry.middy.js

//...
const middleware = {
  before: (handler, next) => {
    Sentry.configureScope(scope => {
      const route = pathOr('<unknown>', ['event', 'path'], handler)
      handler.context.sentry = scope
      // doesn't work
      // scope.addBreadcrumb({ message: 'scope.breadcrumb route=' + route }, 100)
      Sentry.addBreadcrumb(
        { message: 'Sentry.breadcrumb route=' + route },
        null,
        scope
      )
      // scope.setExtra('route', route)
      // scope.setTag('user_mode', 'admin');
      // scope.setUser({ id: '4711' })
      next()
    })
  },
  //...
}