diff --git a/README.md b/README.md
index 7342483..2ed9a87 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,8 @@
 cosmos_server-sb
 ===============
 
-cosmos_server on spring boot with JAX-RS
\ No newline at end of file
+cosmos_server on spring boot with JAX-RS  
+start server
+```aidlbash
+$ gradle bootRun
+```
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 53b39bc..7bafe49 100644
--- a/build.gradle
+++ b/build.gradle
@@ -24,4 +24,5 @@
     runtimeOnly 'mysql:mysql-connector-java'
     providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
+    compile("com.fasterxml.jackson.core:jackson-databind")
 }
diff --git a/src/main/java/com/example/cosmos_serversb/resource/GroupsResource.java b/src/main/java/com/example/cosmos_serversb/resource/GroupsResource.java
new file mode 100644
index 0000000..ba8998e
--- /dev/null
+++ b/src/main/java/com/example/cosmos_serversb/resource/GroupsResource.java
@@ -0,0 +1,17 @@
+package com.example.cosmos_serversb.resource;
+
+import org.springframework.stereotype.Component;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+
+@Component
+@Path("/groups")
+public class GroupsResource {
+
+    @GET
+    public String index() {
+        return "{1:Tiger}";
+    }
+
+}
diff --git a/src/main/java/com/example/cosmos_serversb/resource/UsersResource.java b/src/main/java/com/example/cosmos_serversb/resource/UsersResource.java
index 5da91a7..d7cd74a 100644
--- a/src/main/java/com/example/cosmos_serversb/resource/UsersResource.java
+++ b/src/main/java/com/example/cosmos_serversb/resource/UsersResource.java
@@ -2,15 +2,28 @@
 
 import javax.ws.rs.GET;
 import javax.ws.rs.Path;
+
 import org.springframework.stereotype.Component;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.core.JsonProcessingException;
+
+class Info {
+    public String name;
+    public String email;
+}
 
 @Component
 @Path("/users")
 public class UsersResource {
-
     @GET
-    public String index() {
-        return "{1:Tiger}";
+    public String index() throws JsonProcessingException {
+        Info info = new Info();
+        info.name = "tiger";
+        info.email = "tiger@gmail.com";
+        ObjectMapper mapper = new ObjectMapper();
+        String json = mapper.writeValueAsString(info);
+
+        return json;
     }
 
 }