temp.java

buildscript {
 repositories {
   // Check that you have the following line (if not, add it):
   google()  // Google's Maven repository
 }
 dependencies {
   ...
   // Add this line
   classpath 'com.google.gms:google-services:4.3.4'
 }
}

allprojects {
 ...
 repositories {
   // Check that you have the following line (if not, add it):
   google()  // Google's Maven repository
   ...
 }
}