authorize: avoid serializing databroker data map to improve performance (#995)

authorize/evaluator/opa/policy/authz.rego

@@ -4,9 +4,9 @@ default allow = false
 
 
 route := first_allowed_route(input.http.url)
-session := input.databroker_data["type.googleapis.com/session.Session"][input.session.id]
-user := input.databroker_data["type.googleapis.com/user.User"][session.user_id]
-directory_user := input.databroker_data["type.googleapis.com/directory.User"][session.user_id]
+session := input.databroker_data.session
+user := input.databroker_data.user
+directory_user := input.databroker_data.directory_user
 
 
 # allow public

authorize/evaluator/opa/policy/authz_test.rego

@@ -7,15 +7,11 @@ test_email_allowed {
 			"allowed_users": ["x@example.com"]
 		}] with
 		input.databroker_data as {
-			"type.googleapis.com/session.Session": {
-				"session1": {
-					"user_id": "user1"
-				}
-			},
-			"type.googleapis.com/user.User": {
-				"user1": {
-					"email": "x@example.com"
-				}
+			"session": {
+                "user_id": "user1"
+            },
+			"user": {
+				"email": "x@example.com"
 			}
 		} with
 		input.http as { "url": "http://example.com" } with