<commit_before>---
title: Login
description: This tutorial will show you how to use the Auth0 Windows Phone SDK to add authentication and authorization to your mobile app.
---

## Windows Phone Tutorial

<%= include('../../_includes/_package', {
  pkgOrg: 'auth0-samples',
  pkgRepo: 'auth0-WindowsPhone-samples',
  githubUrl:'https://github.com/auth0-samples/auth0-WindowsPhone-samples/tree/master/00-Starter-Seed',
  pkgBranch: 'master',
  pkgPath: '00-Starter-Seed/WindowsPhoneSilverlight',
  pkgFilePath: null,
  pkgType: 'none'
}) %>

**Otherwise, if you already have an existing application, please follow the steps below.**

### 1. Install the Auth0.WindowsPhone package

You can either run the following command or install it via the **Package Manager** UI.

${snippet(meta.snippets.dependencies)}

### 2. Setting up the callback URL in Auth0

<div class="setup-callback">
<p>Go to the <a href="${uiAppSettingsURL}">Application Settings</a> section in the Auth0 dashboard and make sure that <strong>Allowed Callback URLs</strong> contains the following value:</p><commit_msg>Update 01-login.md<commit_after>---
title: Login
description: This tutorial will show you how to use the Auth0 Windows Phone SDK to add authentication and authorization to your mobile app.
---

## Windows Phone Tutorial

<%= include('../../_includes/_package', {
  pkgOrg: 'auth0-samples',
  pkgRepo: 'auth0-WindowsPhone-samples',
  githubUrl:'https://github.com/auth0-samples/auth0-WindowsPhone-samples/tree/master/00-Starter-Seed/WindowsPhoneSilverlight',
  pkgBranch: 'master',
  pkgPath: '00-Starter-Seed/WindowsPhoneSilverlight',
  pkgFilePath: null,
  pkgType: 'none'
}) %>

**Otherwise, if you already have an existing application, please follow the steps below.**

### 1. Install the Auth0.WindowsPhone package

You can either run the following command or install it via the **Package Manager** UI.

${snippet(meta.snippets.dependencies)}

### 2. Setting up the callback URL in Auth0

<div class="setup-callback">
<p>Go to the <a href="${uiAppSettingsURL}">Application Settings</a> section in the Auth0 dashboard and make sure that <strong>Allowed Callback URLs</strong> contains the following value:</p>
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{'dir': 'git-commits-cleaned', 'id': '6882516', 'n_tokens_mistral': 667, 'n_tokens_neox': 625, 'n_words': 218}