React-native google signin gives Developer Error

I am trying Google Sign In using React-native-google-signin plugin but it gives me DEVELOPER_ERROR error. I have done exactly same as mention in its documentation. Here are my code and steps.

1. Installed react-native-google-signin plugin using npm i react-native-google-signin command.

2. Then I've linked it with react-native link react-native-google-signin

3. After that I did setup of build.gradle file as they mention it in the documentation.

    ext {     buildToolsVersion = "27.0.3"     minSdkVersion = 16     compileSdkVersion = 27     targetSdkVersion = 26     supportLibVersion = "27.1.1"     googlePlayServicesAuthVersion = "15.0.1" } dependencies {     classpath 'com.android.tools.build:gradle:3.1.2'     classpath 'com.google.gms:google-services:3.2.1' } allprojects {     repositories {             mavenLocal()             google()              maven {url "https://maven.google.com"}             jcenter()             maven {             // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm             url "$rootDir/../node_modules/react-native/android"             }             maven {                 url 'https://maven.google.com/'                 name 'Google'             }     } }

4. Updated the android/app/build.gradle

    dependencies {     implementation 'com.facebook.android:facebook-android-sdk:4.34.0'     implementation project(':react-native-fbsdk')     compile project(':react-native-vector-icons')     compile project(':react-native-fused-location')     compile project(':react-native-fs')     compile project(':react-native-image-resizer')     compile project(':react-native-geocoder')     compile project(':react-native-device-info')     compile project(':react-native-image-picker')     compile fileTree(dir: "libs", include: ["*.jar"])     compile "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}"     compile "com.facebook.react:react-native:+"  // From node_modules     implementation project(":react-native-google-signin")     compile (project(':react-native-maps')){         exclude group: "com.google.android.gms"      }     implementation 'com.google.android.gms:play-services-auth:15.0.1'     implementation 'com.google.android.gms:play-services-maps:15.0.1'     implementation 'com.google.android.gms:play-services-location:15.0.1'     implementation 'com.google.android.gms:play-services-base:15.0.1' } task copyDownloadableDepsToLibs(type: Copy) {     from configurations.compile     into 'libs' } apply plugin: 'com.google.gms.google-services'

5. Then generated the SHA1 key using Android Studio debug.keystore and generated the google-services.json file in the Firebase console.

6. Then I set up the login.js page like this:

    async componentDidMount() {     this._configureGoogleSignIn(); } _configureGoogleSignIn() {     GoogleSignin.configure({         webClientId: '775060548127-5nfj43q15l75va9pfav2jettkha7hm2a.apps.googleusercontent.com',// my clientID         offlineAccess: false     }); } async GoogleSignin() { try {     await GoogleSignin.hasPlayServices();     const userInfo = await GoogleSignin.signIn();     // this.setState({ userInfo, error: null });     Alert.alert("success:" + JSON.stringify(userInfo)); } catch (error) {     if (error.code === statusCodes.SIGN_IN_CANCELLED) {         // sign in was cancelled         Alert.alert('cancelled');     } else if (error.code === statusCodes.IN_PROGRESS) {         // operation in progress already         Alert.alert('in progress');     } else if (error.code === statusCodes.PLAY_SERVICES_NOT_AVAILABLE) {         Alert.alert('play services not available or outdated');     } else {         Alert.alert('Something went wrong', error.toString());         this.setState({             error,         });     } }

   }

These are my details so please someone help me on this. I cannot find the appropriate solution online and yes my SHA1 key and clientID is correct. I've checked it already.