I read this blog post which shows how to filter entries by linked references in contentful Graphql. https://www.contentful.com/blog/2021/06/15/filter-entries-by-linked-references-in-graphql-api/ But i can't do as it says. Graphql playground only highlighting the entryCollection with sys data. I need the parent blogPostCollection but it doesn't show up. What should I do ? Anything changed ? I followed all the tutorials and blog but it ain't working anymore. Besides I can't query the author-name and details under the blogPostCollection. It's already took a lot of time. I tried the same schema in sanity and I was able to query the author details under the blog post.