   `private_key_salt` varchar(64) NOT NULL,
   `register_time` int(20) NOT NULL,
   `salt` varchar(128) NOT NULL,
-  `user_hash` varchar(16) NOT NULL,
+  `user_hash` varchar(25) NOT NULL,
   `user_name` varchar(40) NOT NULL,
   `user_role` enum('Buyer','Vendor','Admin') NOT NULL,
   `local_currency` int(11) NOT NULL,

CREATE TABLE IF NOT EXISTS `bw_reviews` (
  `id` int(9) NOT NULL AUTO_INCREMENT,
  `review_type` varchar(10) NOT NULL,
  `subject_hash` varchar(20) NOT NULL,
  `json` text NOT NULL,
  `average_rating` varchar(4) NOT NULL,
  `timestamp` varchar(20) NOT NULL,

CREATE TABLE IF NOT EXISTS `bw_review_auth_tokens` (
  `id` int(9) NOT NULL AUTO_INCREMENT,
  `auth_token` varchar(64) NOT NULL,
  `user_hash` varchar(25) NOT NULL,
  `review_type` varchar(20) NOT NULL,
  `order_id` int(9) NOT NULL,
  PRIMARY KEY (`id`),
