Create users.
Username is from number
The length of the password for auth is
The length of the password for WEB is
Billing group is
Expiry date is ('yyyy-mm-dd hh:mm:ss' means expiry time; digit, such as 11.2, means how many hours since first login; empty means NEVER expired.)
MAC addr. is (00:00:00:00:00:00 means the MAC addr that first logined, or empty means NEVER check it.)
Their initial average speed is KBPS
Balance is dollars.