Apps Disable the plugin and check your dependencies tree using ./gradlew :app:dependencies.

[Nagori]

I am adding firebase auth sdk but it showing an error i can't understand what is happening here please please help me.

Error: The library com.google.android.gmslay-services-basement is being requested by various other libraries at [[15.0.1,15.0.1]], but resolves to 16.1.0. Disable the plugin and check your dependencies tree using ./gradlew :app:dependencies.

while adding this one: implementation 'com.google.firebase:firebase-auth:16.1.0

build.gradle (app level)
implementation 'com.google.firebase:firebase-core:16.0.1'
implementation 'com.google.firebase:firebase-auth:16.1.0'
apply plugin: 'com.google.gms.google-services'

build.gradle (project level)
classpath 'com.google.gms:google-services:4.0.2'