Cannot resolve symbol default_web_client_id in Firebase's Android Codelab

Question

I am trying to learn Firebase, so I went through the Android Codelab. The project they gave me however, had an error:

Cannot resolve symbol default_web_cl

Answer 1

Update your project level build.gradle file with the following code:

buildscript {
repositories {
    google()
    jcenter()
    mavenCentral()
}
dependencies {
    classpath 'com.android.tools.build:gradle:3.3.2'
    classpath 'com.google.gms:google-services:4.2.0'
}}
allprojects {
repositories {
    google()
    jcenter()
    maven { url "https://maven.google.com"}  
}}
task clean(type: Delete) {
delete rootProject.buildDir }

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