code: def delete(
      self,
      context: AuthedServiceContext,
      uid: UID = None,
      url: str = None,
  ) -> Union[SyftSuccess, SyftError]:
      # TODO - we need to make sure that there are no workers running an image bound to this registry
  
      # if url is provided, get uid from url
      if url:
          res = self.stash.delete_by_url(context.credentials, url)
          if res.is_err():
              return SyftError(message=res.err())
          return SyftSuccess(
              message=f"Image Registry URL: {url} successfully deleted."
          )
  
      # if uid is provided, delete by uid
      if uid:
          res = self.stash.delete_by_uid(context.credentials, uid)
          if res.is_err():
              return SyftError(message=res.err())
          return SyftSuccess(
              message=f"Image Registry ID: {uid} successfully deleted."
          )
      else:
          return SyftError(
              message="Either UID or URL must be provided."
          )
  
imports: from typing import List
  from typing import Union
  from ...serde.serializable import serializable
  from ...store.document_store import DocumentStore
  from ...types.uid import UID
  from ..context import AuthedServiceContext
  from ..response import SyftError
  from ..response import SyftSuccess
  from ..service import AbstractService
  from ..service import SERVICE_TO_TYPES
  from ..service import TYPE_TO_SERVICE
  from ..service import service_method
  from ..user.user_roles import DATA_OWNER_ROLE_LEVEL
  from .image_registry import SyftImageRegistry
  from .image_registry_stash import SyftImageRegistryStash
label_desc: Use image node_id 3 for calling the SyftImageRegistryService obj's underlying member method code with example usage: obj.delete(context, uid, url) and returns: SyftSuccess, SyftSuccess, SyftError, SyftError, SyftError