code: def settings_module(self):
          
          settings_module = parse_conf_data(
              os.environ.get(
                  self.ENVVAR_FOR_DYNACONF, self.SETTINGS_FILE_FOR_DYNACONF
              ),
              tomlfy=True,
          )
          if settings_module != getattr(self, "SETTINGS_MODULE", None):
              self.set("SETTINGS_MODULE", settings_module)
          return self.SETTINGS_MODULE
docs: Gets SETTINGS_MODULE variable