Add test query

AdamZaczek · AdamZaczek · commit 6e54271962af · 2020-04-26T03:34:27.000+02:00
diff --git a/README.md b/README.md
@@ -67,4 +67,17 @@ $ yarn deploy-prod              # Deploy the app to PROD environment
 ```
 
 For more information refer to the [Deployment](https://github.com/kriasoft/nodejs-api-starter/wiki/deployment)
-guide in the project's Wiki.
+guide in the project's Wiki.
+
+### Queries to test
+```graphql
+{
+  users {
+    edges {
+      node {
+        username
+      }
+    }
+  }
+}
+```
