code: def _create_database(self):
          
  
          self._logger.info('creating user database')
          sql = '''CREATE TABLE IF NOT EXISTS user (
              username NOT NULL PRIMARY KEY,
              pwd_salt NOT NULL,
              pwd_hash NOT NULL,
              full_name,
              trusted NOT NULL DEFAULT 0,
              readonly NOT NULL DEFAULT 0
          )'''
          self._db_curs.execute(sql)
          self._db_conn.commit()
docs: Set up database
  
              Creates tables required for the authentication module.