Add data class

src/main/kotlin/Greeting.kt

@@ -1,3 +1,3 @@
 fun greeting() {
-    println("Hello, user!")
+    println("Hello, ${User("User", "Userovich")}!")
 }

src/main/kotlin/User.kt

@@ -0,0 +1 @@
+data class User(val name: String, val lastname: String)