code: def _url(self, path):
      return f"{self.api_url}/{path.lstrip('/')}?api_key={self.api_key}"
  
file_path: dstack/src/dstack/_internal/core/backends/vastai/api_client.py
imports: import shlex
  import threading
  import time
  from typing import List, Optional, Union
  import requests
  from requests.adapters import HTTPAdapter, Retry
  import dstack._internal.server.services.docker
  from dstack._internal.core.errors import NoCapacityError
  from dstack._internal.core.models.configurations import RegistryAuth
label_desc: Use image node_id 9 for calling the VastAIAPIClient obj's underlying member method code with example usage: obj._url(path) and returns: self, str, path, str, self