Firebase google_sign_in: File google-services.json is missing

1. I'm also facing the same problem. Even I tried to copy & paste (after using 777 not a good idea) google-services.json in this missing location but I can't do that

2. For this issue Plugin project :firebase_core_web not found. Please update settings.gradle. Plugin project :google_sign_in_web not found. Please update settings.gradle.

I added following code in settings.gradle Source

def flutterProjectRoot = rootProject.projectDir.parentFile.toPath()

def plugins = new Properties()

def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins')
if (pluginsFile.exists()) {

    pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) }
}

plugins.each { name, path ->
    def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile()
    include ":$name"
    project(":$name").projectDir = pluginDirectory
}

3. After adding these lines in settings.gradle Plugin project :firebase_core_web not found......... issue resolved and then new issue rise google-serivces.json missing.

File google-services.json is missing. The Google Services Plugin cannot function without it. 
 Searched Location: 
/home/tango4567/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.13.6/android/src/nullnull/google-services.json
/home/tango4567/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.13.6/android/src/debug/google-services.json
/home/tango4567/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.13.6/android/src/nullnullDebug/google-services.json
/home/tango4567/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.13.6/android/src/nullnull/debug/google-services.json
/home/tango4567/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.13.6/android/src/debug/nullnull/google-services.json
/home/tango4567/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.13.6/android/google-services.json

flutter doctor -v

[✓] Flutter (Channel beta, 1.18.0-11.1.pre, on Linux, locale en_IN)
    • Flutter version 1.18.0-11.1.pre at /home/tango4567/flutter
    • Framework revision 2738a1148b (3 weeks ago), 2020-05-13 15:24:36 -0700
    • Engine revision ef9XXcXXX
    • Dart version 2.9.0 (build 2.9.0-8.2.beta)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at /home/tango4567/Android/Sdk/
    • Platform android-29, build-tools 29.0.3
    • ANDROID_SDK_ROOT = /home/tango4567/Android/Sdk/
    • Java binary at: /snap/android-studio/90/android-studio/jre/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at google-chrome

[✓] Android Studio (version 4.0)
    • Android Studio at /snap/android-studio/90/android-studio
    • Flutter plugin version 46.0.2
    • Dart plugin version 193.7361
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] Connected device (3 available)
    • XX AX0XX   • RXXXXXXXXD • android-arm64  • Android 10 (API 29)
    • Web Server • web-server  • web-javascript • Flutter Tools
    • Chrome     • chrome      • web-javascript • Google Chrome 83.0.4103.61

• No issues found!

tango4567 / solutions

Firebase google_sign_in: File google-services.json is missing #29