compile 'com.google.firebase:firebase-auth:10.2.0'
compile 'com.google.firebase:firebase-core:10.2.0'
compile 'com.firebaseui.firebase-ui:1.2.0'

apply plugin: 'com.google.gms.google-services'

allprojects {
repositories {
    jcenter()
    maven { url 'https://maven.fabric.io/public' }
}

dependencies {
    classpath 'com.android.tools.build:gradle:2.3.0'
    classpath 'com.google.gms:google-services:3.0.0'
    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}

android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    tools:replace="android:supportsRtl"

Error:Failed to resolve: com.firebaseui.firebase-ui:1.2.0: