title: Add, download, and delete custom user data to Identity in an ASP.NET Core project
author: rick-anderson
description: Learn how to add custom user data to Identity in an ASP.NET Core project. Delete data per GDPR.
monikerRange: '>= aspnetcore-2.1'
ms.author: riande
ms.date: 6/16/2018
uid: security/authentication/add-user-data
---
# Add, download, and delete custom user data to Identity in an ASP.NET Core project
By [Rick Anderson](https://twitter.com/RickAndMSFT)
This article shows how to:
* Add custom user data to an ASP.NET Core web app.
* Decorate the custom user data model with the [PersonalData](/dotnet/api/microsoft.aspnetcore.identity.personaldataattribute?view=aspnetcore-2.1) attribute so it's automatically available for download and deletion. Making the data able to be downloaded and deleted helps meet [GDPR](xref:security/gdpr) requirements.
The project sample is created from a Razor Pages web app, but the instructions are similar for a ASP.NET Core MVC web app.
[View or download sample code](https://github.com/aspnet/Docs/tree/live/aspnetcore/security/authentication/add-user-data/sample) ([how to download](xref:tutorials/index#how-to-download-a-sample))
## Prerequisites
[!INCLUDE [](~/includes/2.1-SDK.md)]
## Create a Razor web app
# [Visual Studio](#tab/visual-studio)
* From the Visual Studio **File** menu, select **New** > **Project**. Name the project **WebApp1** if you want to it match the namespace of the [download sample](https://github.com/aspnet/Docs/tree/live/aspnetcore/security/authentication/add-user-data/sample) code.
* Select **ASP.NET Core Web Application** > **OK**
* From **Solution Explorer**, right-click on the project > **Add** > **New Scaffolded Item**.
* From the left pane of the **Add Scaffold** dialog, select **Identity** > **ADD**.
* In the **ADD Identity** dialog, the following options:
* Select your existing layout file *~/Pages/Shared/_Layout.cshtml*
* Select the following files to override:
* **Account/Register**
* **Account/Manage/Index**
* Select the **+** button to create a new **Data context class**. Accept the type (**WebApp1.Models.WebApp1Context** if you named the project **WebApp1**).
* Select the **+** button to create a new **User class**. Accept the type (**WebApp1User** if you named the project **WebApp1**) > **Add**.
* Select **ADD**.
# [.NET Core CLI](#tab/netcore-cli)
If you have not previously installed the ASP.NET scaffolder, install it now:
Add a package reference to [Microsoft.VisualStudio.Web.CodeGeneration.Design](https://www.nuget.org/packages/Microsoft.VisualStudio.Web.CodeGeneration.Design/) to the project (.csproj) file. Run the following command in the project directory:
Follow the instruction in [Migrations, UseAuthentication, and layout](xref:security/authentication/scaffold-identity#efm) to perform the following steps:
* Create a migration and update the database.
* Add `UseAuthentication` to `Startup.Configure`.
* Add `<partial name="_LoginPartial" />` to the layout file.
* Test the app:
* Register a user
* Select the new user name (next to the **Logout** link). You might need to expand the window or select the navigation bar icon to show the user name and other links.
* Select the **Personal Data** tab.
* Select the **Download** button and examined the *PersonalData.json* file.
* Test the **Delete** button, which deletes the logged on user.
## Add custom user data to the Identity DB
Update the `IdentityUser` derived class with custom properties. If you named your project WebApp1, the file is named *Areas/Identity/Data/WebApp1User.cs*. Update the file with the following code:
