ci/github-script/merge: fix with deleted users

          // bad code between the approval and the merge.

          commit_id === pull_request.head.sha,

      )

      .map(({ user }) => user.id),

      .map(({ user }) => user?.id)

      // Some users have been deleted, so filter these out.

      .filter(Boolean),

  )

  const checklist = {

  )

  const comments = events.slice(lastPush + 1).filter(

    ({ event, body, node_id }) =>

    ({ event, body, user, node_id }) =>

      ['commented', 'reviewed'].includes(event) &&

      hasMergeCommand(body) &&

      // Ignore comments where the user has been deleted already.

      user &&

      // Ignore comments which had already been responded to by the bot.

      !events.some(

        ({ event, user, body }) =>

        ({ event, body }) =>

          ['commented'].includes(event) &&

          // We're only testing this hidden reference, but not the author of the comment.

          // We'll just assume that nobody creates comments with this marker on purpose.