Admob and Google Play Service error

**When I import admob and google play service plugins (Google Official) and try to build project for android its give me bellow error. Please I request you to help me to resolve this issue thank you. Admob : https://github.com/googleads/googleads-mobile-unity Google Play Games : https://github.com/playgameservices/play-games-plugin-for-unity**

CommandInvokationFailure: Gradle build failed. C:\Program Files\Java\jdk1.8.0_91\bin\java.exe -classpath "E:\Setups\Unity\Editor\Data\PlaybackEngines\AndroidPlayer\Tools\gradle\lib\gradle-launcher-4.2.1.jar" org.gradle.launcher.GradleMain "-Dorg.gradle.jvmargs=-Xmx2048m" "assembleRelease"

stderr[

FAILURE: Build failed with an exception.

• What went wrong: Execution failed for task ':transformDexWithDexForRelease'.

  com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.dex.DexException: Multiple dex files define Lcom/google/android/gms/auth/api/Auth$AuthCredentialsOptions$Builder;

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

• Get more help at https://help.gradle.org

BUILD FAILED in 8s ] stdout[ :preBuild UP-TO-DATE :GoogleMobileAdsPlugin:preBuild UP-TO-DATE :GoogleMobileAdsPlugin:preReleaseBuild UP-TO-DATE :GoogleMobileAdsPlugin:checkReleaseManifest :GoogleMobileAdsPlugin:processReleaseManifest :GooglePlayGamesManifest.plugin:preBuild UP-TO-DATE :GooglePlayGamesManifest.plugin:preReleaseBuild UP-TO-DATE :GooglePlayGamesManifest.plugin:checkReleaseManifest :GooglePlayGamesManifest.plugin:processReleaseManifest :preReleaseBuild UP-TO-DATE :GoogleMobileAdsPlugin:compileReleaseAidl :GooglePlayGamesManifest.plugin:compileReleaseAidl :compileReleaseAidl UP-TO-DATE :GoogleMobileAdsPlugin:packageReleaseRenderscript NO-SOURCE :GooglePlayGamesManifest.plugin:packageReleaseRenderscript NO-SOURCE :compileReleaseRenderscript UP-TO-DATE :checkReleaseManifest UP-TO-DATE :generateReleaseBuildConfig UP-TO-DATE :prepareLintJar UP-TO-DATE :generateReleaseResValues UP-TO-DATE :generateReleaseResources UP-TO-DATE :GoogleMobileAdsPlugin:compileReleaseRenderscript :GoogleMobileAdsPlugin:generateReleaseResValues :GoogleMobileAdsPlugin:generateReleaseResources :GoogleMobileAdsPlugin:packageReleaseResources :GooglePlayGamesManifest.plugin:compileReleaseRenderscript :GooglePlayGamesManifest.plugin:generateReleaseResValues :GooglePlayGamesManifest.plugin:generateReleaseResources :GooglePlayGamesManifest.plugin:packageReleaseResources :mergeReleaseResources UP-TO-DATE :createReleaseCompatibleScreenManifests UP-TO-DATE :processReleaseManifest :splitsDiscoveryTaskRelease UP-TO-DATE :GoogleMobileAdsPlugin:platformAttrExtractor :GooglePlayGamesManifest.plugin:platformAttrExtractor :GoogleMobileAdsPlugin:generateReleaseBuildConfig :GoogleMobileAdsPlugin:prepareLintJar UP-TO-DATE :GoogleMobileAdsPlugin:javaPreCompileRelease :GoogleMobileAdsPlugin:processReleaseJavaRes NO-SOURCE :GooglePlayGamesManifest.plugin:generateReleaseBuildConfig :GooglePlayGamesManifest.plugin:prepareLintJar UP-TO-DATE :GooglePlayGamesManifest.plugin:javaPreCompileRelease :GooglePlayGamesManifest.plugin:processReleaseJavaRes NO-SOURCE :compileReleaseNdk NO-SOURCE :mergeReleaseShaders UP-TO-DATE :compileReleaseShaders UP-TO-DATE :generateReleaseAssets UP-TO-DATE :GoogleMobileAdsPlugin:mergeReleaseShaders :GoogleMobileAdsPlugin:compileReleaseShaders :GoogleMobileAdsPlugin:generateReleaseAssets :GoogleMobileAdsPlugin:mergeReleaseAssets :GooglePlayGamesManifest.plugin:mergeReleaseShaders :GoogleMobileAdsPlugin:processReleaseResources :GoogleMobileAdsPlugin:generateReleaseSources :GoogleMobileAdsPlugin:compileReleaseJavaWithJavac :GoogleMobileAdsPlugin:transformClassesAndResourcesWithPrepareIntermediateJarsForRelease :GooglePlayGamesManifest.plugin:compileReleaseShaders :GooglePlayGamesManifest.plugin:generateReleaseAssets :GooglePlayGamesManifest.plugin:mergeReleaseAssets :mergeReleaseAssets :mergeReleaseJniLibFolders UP-TO-DATE :GoogleMobileAdsPlugin:compileReleaseNdk NO-SOURCE :GoogleMobileAdsPlugin:mergeReleaseJniLibFolders :GoogleMobileAdsPlugin:transformNativeLibsWithMergeJniLibsForRelease :GoogleMobileAdsPlugin:transformNativeLibsWithIntermediateJniLibsForRelease :GooglePlayGamesManifest.plugin:compileReleaseNdk NO-SOURCE :GooglePlayGamesManifest.plugin:mergeReleaseJniLibFolders :GooglePlayGamesManifest.plugin:transformNativeLibsWithMergeJniLibsForRelease :GooglePlayGamesManifest.plugin:transformNativeLibsWithIntermediateJniLibsForRelease :processReleaseJavaRes NO-SOURCE :validateSigningRelease :GoogleMobileAdsPlugin:extractReleaseAnnotations :GoogleMobileAdsPlugin:mergeReleaseConsumerProguardFiles UP-TO-DATE :GooglePlayGamesManifest.plugin:processReleaseResources :processReleaseResources :generateReleaseSources :GooglePlayGamesManifest.plugin:generateReleaseSources :GooglePlayGamesManifest.plugin:compileReleaseJavaWithJavac :GooglePlayGamesManifest.plugin:transformClassesAndResourcesWithPrepareIntermediateJarsForRelease :javaPreCompileRelease UP-TO-DATE :compileReleaseJavaWithJavac UP-TO-DATE :compileReleaseSources UP-TO-DATE :lintVitalRelease :transformClassesWithPreDexForRelease UP-TO-DATE :transformDexWithDexForRelease FAILED 62 actionable tasks: 43 executed, 19 up-to-date ] exit code: 1 UnityEditor.Android.Command.WaitForProgramToRun (UnityEditor.Utils.Program p, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) UnityEditor.Android.AndroidJavaTools.RunJava (System.String args, System.String workingdir, System.Action`1 progress, System.String error) UnityEditor.Android.GradleWrapper.Run (UnityEditor.Android.AndroidJavaTools javaTools, System.String workingdir, System.String task, System.Action`1 progress) Rethrow as GradleInvokationException: Gradle build failed UnityEditor.Android.GradleWrapper.Run (UnityEditor.Android.AndroidJavaTools javaTools, System.String workingdir, System.String task, System.Action`1 progress) UnityEditor.Android.PostProcessor.Tasks.BuildGradleProject.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) UnityEditor.BuildPlayerWindow:BuildPlayerAndRun()

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