code: def from_token(cls, url, path, token):
          
          source_dict = cls._fetch_secrets(url, path, token)
          return cls(source_dict, url, path, token)
docs: Constructor: use token authentication to read secrets from a Vault path
  
          See https://www.vaultproject.io/docs/auth/token.html
  
          Args:
              url: Vault url
              path: Vault path where secrets are stored
              vault_token: token (must have access to vault path)