title: Unity Firebase fails on load: "Failed to read Firebase options from the app's resources."
body: <p>My Android build fails to initialise Firebase Messaging with the following error:</p>
  
  <pre><code>I/Unity   (30673): InitializationException: Failed to read Firebase options from the app's resources.  You'll need to either at least set App ID and API key or include google-services.json your app's resources.
  I/Unity   (30673):   at Firebase.FirebaseApp.CreateAndTrack (Firebase.CreateDelegate createDelegate) [0x00000] in &lt;filename unknown&gt;:0
  I/Unity   (30673):   at Firebase.FirebaseApp.Create () [0x00000] in &lt;filename unknown&gt;:0
  I/Unity   (30673):   at Firebase.FirebaseApp.get_DefaultInstance () [0x00000] in &lt;filename unknown&gt;:0
  I/Unity   (30673):   at Firebase.Messaging.FirebaseMessaging+Listener..ctor () [0x00000] in &lt;filename unknown&gt;:0
  I/Unity   (30673):   at Firebase.Messaging.FirebaseMessaging+Listener.Create () [0x00000] in &lt;filename unknown&gt;:0
  I/Unity   (30673):   at Firebase.Messaging.FirebaseMessaging..cctor () [0x00000] in &lt;filename unknown&gt;:0
  I/Unity   (30673): Rethrow as TypeInitializationException: An exception was thrown by the type initializer for Firebase.Messaging.FirebaseMessaging
  </code></pre>
  
  <p>I have downloaded and placed the <code>google-services.json</code> file in the project root and a <code>google-services.xml</code> file has been generated in <code>Plugins/Android/Firebase/res/values</code> that looks to have all the required values.</p>
  
  <p>Also running the Google Play Games package if that would make any difference. Unity 5.3 and Firebase 4.1. Had it running in the past but had to re-install the packages and not working now.</p>