title: Existing Android App Integration to Firebase
body: <p>Pressing the following button is giving the error below the image. </p>
  
  <p><a href="https://i.stack.imgur.com/L2KgP.png" rel="noreferrer"><img src="https://i.stack.imgur.com/L2KgP.png" alt="enter image description here"></a></p>
  
  <pre><code>Firebase
  No clients were able to be added to your Firebase project for the following reasons:
  An app with this package name and SHA1 is already connected to a Google project. If you have used a Google API previously, please select that project in the Connect to an existing Project list. 
  Client Package Name: packagename
  Client SHA1: [59:17:0C:D9:63:14:42:A5:81:13:20:F8:58:0F:96:D8:6A:65]
  </code></pre>
  
  <p>I could not find the <code>Connect to an existing Project list</code> mentioned in the error message. </p>
  
  <p>I created the project in firebase by clicking "Import Google Project" button and selecting an existing google project. Later i tried adding both debug and production signature SHA1's but that did not help. </p>
  
  <p><a href="https://i.stack.imgur.com/G08i6.png" rel="noreferrer"><img src="https://i.stack.imgur.com/G08i6.png" alt="enter image description here"></a></p>
  
  <p>anyone faced the same issue? </p>
  
  <p>EDIT: 
  Today the existing project list dialog started appearing but i still get the error even if i select from the existing project list. I started thinking that this is a preview bug. :(</p>
  
  <p><a href="https://i.stack.imgur.com/0EKNs.png" rel="noreferrer"><img src="https://i.stack.imgur.com/0EKNs.png" alt="enter image description here"></a></p>