code: def update(
      self, context: AuthedServiceContext, settings: NodeSettingsUpdate
  ) -> Result[Ok, Err]:
      result = self.stash.get_all(context.credentials)
      if result.is_ok():
          current_settings = result.ok()
          if len(current_settings) > 0:
              new_settings = current_settings[0].copy(
                  update=settings.to_dict(exclude_empty=True)
              )
              update_result = self.stash.update(
                  context.credentials, new_settings
              )
              if update_result.is_ok():
                  return result
              else:
                  return SyftError(message=update_result.err())
          else:
              return SyftError(message="No settings found")
      else:
          return SyftError(message=result.err())
  
imports: from typing import Union
  from result import Err
  from result import Ok
  from result import Result
  from ...serde.serializable import serializable
  from ...store.document_store import DocumentStore
  from ...util.experimental_flags import flags
  from ..context import AuthedServiceContext
  from ..context import UnauthedServiceContext
  from ..response import SyftError
  from ..response import SyftSuccess
  from ..service import AbstractService
  from ..service import service_method
  from ..warnings import HighSideCRUDWarning
  from .settings import NodeSettingsUpdate
  from .settings import NodeSettingsV2
  from .settings_stash import SettingsStash
label_desc: Use image node_id 4 for calling the SettingsService obj's underlying member method code with example usage: obj.update(context, settings) and returns: SyftError, SyftError, result, SyftError