feat(auth): implemented users and user auth

#5 [Story] Create User Sessions

knockoutwhistweb/app/model/users/User.scala

@@ -0,0 +1,20 @@
+package model.users
+
+import java.util.UUID
+
+case class User(
+               internalId: Long,
+               id: UUID,
+               name: String,
+               passwordHash: String
+               ) {
+
+  def withName(newName: String): User = {
+    this.copy(name = newName)
+  }
+
+  private def withPasswordHash(newPasswordHash: String): User = {
+    this.copy(passwordHash = newPasswordHash)
+  }
+
+}