cloud_furestore and firebase_auth compatiblity issue in Flutter

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I am developing a Flutter app. My app works fine with cloud_firestore and firebase_auth packages when I use them separately. However, when I include both of them together in my pubspecs.yaml file, the build fails and the following message is shown:

Note: /home/saber/Code/mobile_dev/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.7.4/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Note: /home/saber/Code/mobile_dev/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.18/android/src/main/java/io/flutter/plugins/firebaseauth/FirebaseAuthPlugin.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: /home/saber/Code/mobile_dev/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.5.18/android/src/main/java/io/flutter/plugins/firebaseauth/FirebaseAuthPlugin.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Note: /home/saber/Code/mobile_dev/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core-0.2.5/android/src/main/java/io/flutter/plugins/firebase/core/FirebaseCorePlugin.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

FAILURE: Build failed with an exception.


What went wrong:
Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.


java.lang.RuntimeException: java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: Unable to merge dex



Here are the depenencies that I have in my pubspec.yaml file:

dependencies:
flutter:
sdk: flutter
firebase_auth: ^0.5.18
cloud_firestore: ^0.7.4


I checked the version of packages and they both seem to be at the latest version.

Any help on resolving this issue would be appreciated!

This might be connected to this issue, but I am not sure.

You need to follow this setup:

Open android/app/build.gradle and add at the bottom of the file:

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


and in the android/build.gradle add the following:

buildscript {
repositories {
// ,,,
}
dependencies {
// ...
classpath 'com.google.gms:google-services:3.2.1'
}
}

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