`account_type` ENUM('CHECK','SAVING') NOT NULL DEFAULT 'CHECK',
`overdraft_credit` FLOAT(20,5) UNSIGNED NOT NULL DEFAULT 0.00000,
PRIMARY KEY (`id`),
-UNIQUE KEY (`pin`),
+UNIQUE (`pin`),
INDEX `userid_type` (`userid`, `account_type`),
INDEX (`account_created`),
INDEX (`account_locked`),