demo

src/main/kotlin/shared/AggregateRoot.kt

@@ -0,0 +1,5 @@
+package shared
+
+abstract class AggregateRoot<T>{
+    abstract val id: T
+}

src/main/kotlin/shared/dto/ChangeUsernameDto.kt

@@ -0,0 +1,3 @@
+package shared.dto
+
+data class ChangeUsernameDto(val id: Long, val firstName: String, val lastName: String, val verificationCode: String)