feat: BAC-30 Implement Jackson Mapping via DTOs

knockoutwhistweb/app/dto/subDTO/UserDTO.scala

@@ -0,0 +1,17 @@
+package dto.subDTO
+
+import model.sessions.UserSession
+
+case class UserDTO(id: String, username: String, host: Boolean = false)
+
+object UserDTO {
+
+  def apply(user: UserSession): UserDTO = {
+    UserDTO(
+      id = user.id.toString,
+      username = user.name,
+      host = user.host
+    )
+  }
+
+}