@classmethod
  @gen.coroutine
  def VerifyPhotoId(cls, client, user_id, device_id, photo_id):
    yield VerifyAssetId(client, user_id, device_id, IdPrefix.Photo, photo_id, has_timestamp=True)
Ensures that a client-provided photo id is valid according
dataset/ETHPy150Open viewfinderco/viewfinder/backend/db/photo.py/Photo.VerifyPhotoId