feat(ui): Websocket

Started implementing functionality to Websocket.

knockoutwhistweb/app/model/users/User.scala

@@ -1,5 +1,7 @@
 package model.users
 
+import play.api.libs.json.{Format, Json}
+
 import java.util.UUID
 
 case class User(
@@ -16,5 +18,7 @@ case class User(
   private def withPasswordHash(newPasswordHash: String): User = {
     this.copy(passwordHash = newPasswordHash)
   }
-
 }
+object User {
+  implicit val userFormat: Format[User] = Json.format[User]
+}