code: async def create(cls, url, *, keyring_filename=None, keyring_data=None):
          
          data = await cls._handler.create(
              url=url, keyring_filename=coalesce(keyring_filename, ""),
              keyring_data=coalesce(keyring_data, ""))
          return cls._object(data)
docs: Create a new `BootSource`.
  
          :param url: The URL for the boot source.
          :param keyring_filename: The path to the keyring file on the server.
          :param keyring_data: The GPG keyring data, binary. as a file-like
              object. For example: an open file handle in binary mode, or an
              instance of `io.BytesIO`.