title: How to use Gradle in Unity
body: <p>Since I want to add Firebase to my Android Game I want to include Google Auth. But I have the following Problem. I need to add some Code to the build.gradle File but I cant find it in my Unity Project.</p>
  
  <p>Here is the manual I found from Firebase : <a href="https://firebase.google.com/docs/auth/android/google-signin" rel="noreferrer">https://firebase.google.com/docs/auth/android/google-signin</a></p>
  
  <p>I searched on all my Drives for build.gradle but found nothing.
  Can you tell me where I find it or what do I have to do to implement the Code from the Link?</p>