Parse.Cloud.define("reverify", function(request, response) {
  Parse.Cloud.useMasterKey();
  var orig_email;
  var userQuery = new Parse.Query("User");
  userQuery.get(request.params.userId).then(function(user) {
    orig_email = user.get("email");
    return user.save({
      email: "dummy@yourdomain.com" /* an email will be sent here as well */
    });
  }).then(function(user) {
    return user.save({
      email: orig_email /* here is the one you really want */
    });
  }).then(function(result) {
    // the object was saved
    response.success(result);
  }, function(error) {
    // there was some error
    response.error(error);
  });
});