How to get the correct salePrice for specific user in GQL?

[aodihis]

In promotions sales, there is an option to specify which user group that entitled for the sales. So here is my question is how to get that sale price for the user in GraphQL.

I have tried to do query for the products in graphQL like this :

product(slug: $slug) {
		id
		title
		slug
		uri
		defaultPrice
		variants {
			price
			sales {
				name
			}
			salePrice
		}
	}

and we also pass the session data when requested it.
So here is our scenario :

1. query the products with sales
2. Login to user account that entitled with the sales
3. do query for the products with sales.

Our expected is in step 3 the sale price is updated, but it turns out still same with price like in step 1 also the sales field is empty.
After some search, found out the issue is in gql cache, so if there is a user that not eligible for the sales query first the gql will get cache, so then if there is second person querying through gql and this person eligible with sales, the returned data from gql is the cache one from user that not eligible from sales.