Missing the (graphql#168)

Author: olizilla

site/learn/BestPractice-Authorization.md

@@ -53,6 +53,6 @@ var postType = new GraphQLObjectType({
 });
 ```
 
-In the example above, we see that the business logic layer requires the caller to provide a user object. If you are using GraphQL.js, the User object should be populated on the `context` argument or `rootValue` in fourth argument of the resolver.
+In the example above, we see that the business logic layer requires the caller to provide a user object. If you are using GraphQL.js, the User object should be populated on the `context` argument or `rootValue` in the fourth argument of the resolver.
 
 We recommend passing a fully-hydrated User object instead of an opaque token or API key to your business logic layer. This way, we can handle the distinct concerns of [authentication](/graphql-js/authentication-and-express-middleware/) and authorization in different stages of the request processing pipeline.