how to add a search field in graghql/django

Question

I am working on this project: https://github.com/mirumee/saleor I added a column to the product model by adding:

account_user = models.ForeignKey(
    Account_User,
    related_name="products",
    on_delete= settings.AUTH_USER_MODEL,
 )

However, after I run "npm run build-schema" and then type

query
{
  products(first: 10) {
    edges {
      cursor
      node {
        id
        name
        description
        slug
        account_user_id
      }
    }
  }

Graghql says ""message": "Cannot query field "account_user_id" on type "Product".",".

Do I miss any step? Do I need to modify the query to add this field? Thanks