Authorization issue

Hi, Thank you for providing so great library. We just have a question, we want to limit the data to user. For example, the regular user can only see the data created by them self. But the administrator can see all of the data. How and where to add this authorization logic into this GraphQL server? Thanks in advance.

Here is a link about authorization from the graphql for your reference.
http://graphql.org/learn/authorization/