docs: def _get_conn(ret=None):
      '''
      Return a MSSQL connection.
      '''
      _options = _get_options(ret)
      dsn = _options.get('dsn')
      user = _options.get('user')
      passwd = _options.get('passwd')
  
      return pyodbc.connect('DSN={0};UID={1};PWD={2}'.format(
              dsn,
              user,
              passwd))