title: Flutter Google Sign In - This App isn't verified error
body: <p>I'm getting a 'This app isn't verified' error when I use the Flutter google_sign_in plug in. I want to get authorisation to Google Drive so added it to the google sign-in scope:</p>
  
  <pre><code>scopes: ['email', 'https://www.googleapis.com/auth/drive'],
  </code></pre>
  
  <p>And it is the request for the drive scope that is causing the error screen to come up ( I tested it with just email and works fine).
  If I look at the docs it seems that Google are saying I have to verify the app, however this is a test app to see if I can get the functionality that a client has requested working with Google Drive and won't ever be promoted. 
  Does anyone know how I can remove this error message for test purposes only?</p>
  
  <p>Many thanks</p>
  
  <p>Here's the actual screen with the error:</p>
  
  <p><a href="https://i.stack.imgur.com/u9fwt.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/u9fwt.jpg" alt="Here&#39;s the screen shot"></a></p>