code: def _read_config(self, filename=None):
          
          if filename:
              self._config_filename = filename
          else:
              try:
                  import appdirs
              except ImportError:
                  raise Exception("Missing dependency for determining config path. Please install "
                                  "the 'appdirs' Python module.")
              self._config_filename = appdirs.user_config_dir(_LIBRARY_NAME, "ProfitBricks") + ".ini"
          if not self._config:
              self._config = configparser.ConfigParser()
              self._config.optionxform = str
              self._config.read(self._config_filename)
docs: Read the user configuration