🐛Update items.py to return status code 403 in case of insufficient permissions

[jpizquierdo]

Change error 400 to error 403 when not enough permissions when requesting items. I think it is better a 403 than a 400 (bad request).

[YuriiMotov]

LGTM

For users we already return status code 403

full-stack-fastapi-template/backend/app/api/routes/users.py

Lines 168 to 172 in 8af907c

	if not current_user.is_superuser:
	raise HTTPException(
	status_code=403,
	detail="The user doesn't have enough privileges",
	)

@jpizquierdo, thanks!

I think we don't need to change frontend to reflect these changes right now - users only see items they have access to, so they will not be able to send invalid request.

But in general we should probably discuss the way 403 errors are handled by frontend. For now UI will remove the access token and ask user to login.