CREATE TABLE user_registration (
  user_name_lower TEXT NOT NULL,
  user_name TEXT NOT NULL PRIMARY KEY,
  serial_number TEXT NOT NULL,
  password TEXT NOT NULL,
  client_version TEXT NOT NULL,
  account_status INTEGER NOT NULL,
  registration_date TEXT NOT NULL,
  times_on INTEGER NOT NULL,
  total_minutes INTEGER NOT NULL,
  user_privileges INTEGER NOT NULL
)
