diff --git a/spring-boot-modules/spring-boot-libraries/README.md b/spring-boot-modules/spring-boot-libraries/README.md
index 10c56ca576..6976435866 100644
--- a/spring-boot-modules/spring-boot-libraries/README.md
+++ b/spring-boot-modules/spring-boot-libraries/README.md
@@ -15,3 +15,21 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
 - [Spring Boot and Togglz Aspect](https://www.baeldung.com/spring-togglz)
 - [Getting Started with GraphQL and Spring Boot](https://www.baeldung.com/spring-graphql)
 - [An Introduction to Kong](https://www.baeldung.com/kong)
+
+### GraphQL sample queries
+
+Query
+```shell script
+curl \
+--request POST 'localhost:8081/graphql' \
+--header 'Content-Type: application/json' \
+--data-raw '{"query":"query {\n    recentPosts(count: 2, offset: 0) {\n        id\n        title\n        author {\n            id\n            posts {\n                id\n            }\n        }\n    }\n}"}'
+```
+
+Mutation
+```shell script
+curl \
+--request POST 'localhost:8081/graphql' \
+--header 'Content-Type: application/json' \
+--data-raw '{"query":"mutation {\n    writePost(title: \"New Title\", author: \"Author2\", text: \"New Text\") {\n        id\n        category\n        author {\n            id\n            name\n        }\n    }\n}"}'
+```
diff --git a/spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/demo/DemoApplication.java b/spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/demo/DemoApplication.java
index eb091b4695..e30ee6104d 100644
--- a/spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/demo/DemoApplication.java
+++ b/spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/demo/DemoApplication.java
@@ -2,12 +2,14 @@ package com.baeldung.demo;
 
 import com.baeldung.graphql.GraphqlConfiguration;
 import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-
+import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
 import org.springframework.context.annotation.Import;
 
 @SpringBootApplication
 @Import(GraphqlConfiguration.class)
+@EnableAutoConfiguration(exclude = {SecurityAutoConfiguration.class})
 public class DemoApplication {
 
     public static void main(String[] args) {
diff --git a/spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/graphql/PostResolver.java b/spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/graphql/PostResolver.java
index dbfde330ea..329d1f469a 100644
--- a/spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/graphql/PostResolver.java
+++ b/spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/graphql/PostResolver.java
@@ -1,7 +1,5 @@
 package com.baeldung.graphql;
 
-import java.util.Optional;
-
 import com.coxautodev.graphql.tools.GraphQLResolver;
 
 public class PostResolver implements GraphQLResolver<Post> {
@@ -11,7 +9,7 @@ public class PostResolver implements GraphQLResolver<Post> {
         this.authorDao = authorDao;
     }
 
-    public Optional<Author> getAuthor(Post post) {
-        return authorDao.getAuthor(post.getAuthorId());
+    public Author getAuthor(Post post) {
+        return authorDao.getAuthor(post.getAuthorId()).orElseThrow(RuntimeException::new);
     }
 }
diff --git a/spring-boot-modules/spring-boot-libraries/src/main/resources/demo.yml b/spring-boot-modules/spring-boot-libraries/src/main/resources/demo.yml
new file mode 100644
index 0000000000..11e54c5449
--- /dev/null
+++ b/spring-boot-modules/spring-boot-libraries/src/main/resources/demo.yml
@@ -0,0 +1,2 @@
+server:
+  port: 8081
diff --git a/spring-boot-modules/spring-boot-libraries/src/main/resources/graphql/post.graphqls b/spring-boot-modules/spring-boot-libraries/src/main/resources/graphql/post.graphqls
new file mode 100644
index 0000000000..0e42f7255c
--- /dev/null
+++ b/spring-boot-modules/spring-boot-libraries/src/main/resources/graphql/post.graphqls
@@ -0,0 +1,24 @@
+type Post {
+    id: ID!
+    title: String!
+    text: String!
+    category: String
+    author: Author!
+}
+
+type Author {
+    id: ID!
+    name: String!
+    thumbnail: String
+    posts: [Post]!
+}
+
+# The Root Query for the application
+type Query {
+    recentPosts(count: Int, offset: Int): [Post]!
+}
+
+# The Root Mutation for the application
+type Mutation {
+    writePost(title: String!, text: String!, category: String, author: String!) : Post!
+}