code: def create_version(self, project_id_or_key, version_name, extra_request_params={}):
          
          request_params = extra_request_params
          request_params["name"] = version_name
          return self.do("POST", "projects/{project_id_or_key}/versions",
                         url_params={"project_id_or_key": project_id_or_key},
                         request_params=request_params,
                         )
docs: client = BacklogClient("your_space_name", "your_api_key")
  
          client.create_version("YOUR_PROJECT",
                                "VERSION_NAME",
                                {"description": "version description"})