title: E/FirebaseInstanceId: Token retrieval failed: AUTHENTICATION_FAILED - what changed?
body: <p>I'm not sure what's going on here, I pulled my recently updated repo and every time I open the app to debug it on an emulator I get <code>E/FirebaseInstanceId: Token retrieval failed: AUTHENTICATION_FAILED</code> as the app loads up the main screen. However this hadn't happened before today so I don't know what could've changed? I deleted the app from the Firebase console and re-added it (through Firebase Assistant), but that didn't fix it either? I've included my build.grade file but I'm not sure what else I need to be looking at, any assistance would be appreciated.</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  apply plugin: 'kotlin-android'
  
  apply plugin: 'kotlin-android-extensions'
  
  android {
      compileSdkVersion 27
      defaultConfig {
          applicationId "com.android.projectrc"
          minSdkVersion 16
          targetSdkVersion 27
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
          vectorDrawables.useSupportLibrary = true
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      implementation 'com.wdullaer:materialdatetimepicker:3.4.0'
      implementation "org.jetbrains.anko:anko:$anko_version"
      implementation fileTree(dir: 'libs', include: ['*.jar'])
      implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
      implementation 'com.android.support:appcompat-v7:27.0.2'
      implementation 'com.android.support:design:27.0.2'
      implementation 'com.android.support.constraint:constraint-layout:1.0.2'
      implementation 'com.github.bumptech.glide:glide:4.2.0'
      implementation 'com.google.firebase:firebase-auth:11.0.4'
      implementation 'com.google.firebase:firebase-database:11.0.4'
      implementation 'com.google.firebase:firebase-storage:11.0.4'
      testImplementation 'junit:junit:4.12'
      androidTestImplementation 'com.android.support.test:runner:1.0.1'
      androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
  }
  
  
  
  
  
  
  
  
  apply plugin: 'com.google.gms.google-services'
  </code></pre>