I can't find any endpoint / gql stuff to add more products to an existing custom collection. I can't use collectionUpdate since it throws error when I tried to add products variable to the gql schema, saying products variable can't be there when updating a collection. I've failed when using the REST API either. This is because we'll hit by "Input max size of 250" error when we try to create a new collection with 250+ products. how do I go around this?
