title: MVC Owin Provider Key Change
body: <p>I recently changed my MVC app from using </p>
  
  <pre><code>app.UseGoogleAuthentication()
  </code></pre>
  
  <p>to</p>
  
  <pre><code>app.UseGoogleAuthentication(new GoogleOAuth2AuthenticationOptions(){
  ClientId = "xxxxxxxxxxx.apps.googleusercontent.com",
  ClientSecret = "xxxxxxxxxxxxxxxxxxxxxxx"}); 
  </code></pre>
  
  <p>When I made this change it changed the provider key that was being returned by google. Resulting in any users already signed up being treated as a new user, Is there a way I can migrate the provider key or tell owin what provider key to use. I really don't want to take a change and manually run an update statement on my database to change the provider key.</p>