ALTER TABLE `users` ADD `user_password_code` VARCHAR(255)  NULL  DEFAULT NULL  AFTER `user_timestamp`;
ALTER TABLE `users` ADD `user_password_timestamp` TIMESTAMP  NULL  AFTER `user_password_code`;
ALTER TABLE `users` ADD `user_activation_code` VARCHAR(255)  NULL  DEFAULT NULL  AFTER `user_password_timestamp`;
ALTER TABLE `users` ADD `user_activation_timestamp` TIMESTAMP  NULL  AFTER `user_activation_code`;
