add some comments

examples/graphiql.py

@@ -15,6 +15,8 @@ class User:
 class Query:
     @strawberry.field
     def user(self) -> Optional[User]:
+        # self.context is an dict with headers, query, and params properties
+        # headers and query are dict and params an array with route parameters
         return User(name="Hello")
 
 

examples/middleware.py

@@ -11,6 +11,7 @@ async def auth(res, req, data=None):
     user = await get_user(req.get_header('authorization'))
     if not user: 
         res.write_status(403).end("not authorized")
+        #returning Falsy in middlewares just stop the execution of the next middleware
         return False
 
     #returns extra data