message: Redirect to /sign_up if for logged out follow / following (closes
diff: @@ -163,7 +163,9 @@ const index = (req, res, next) => {
  };
  const follow = suffix => (req, res, next) => {
  - Promise.all([
  + if (!req.user) { return res.redirect(301, '/sign_up'); }
  +
  + return Promise.all([
  fetchAndSetProfileModel(req, res),
  fetchAndSetProfileHeader(req, res),
  fetchAndSetFollow(suffix)(req, res),
  