App Sync Graph QL and Cognito help

I need to add a sort by key on my DocumentDate and created at date also add Authorisation to the results that are returned. Eg. I use Cognito to authorize with my Application, I need to only return results where the Cognito sub Uuid matches in my dynamo table or some way to allow [login to view URL] in SQL It would be like select * from table where user_id = "Üser ID"