Generating Google OAuth2 token using GoogleCredentials

Hi,

We are trying the generate the Google Oauth2 token using the GoogleCredentials which reads authentication details using the json provided below in AEM as a Cloud Service:-

test.json file (placed user project core module- core/src/main/resources/test.json)

Note: Actual values are replaced with test for security reasons.

{
"type": "test",
"project_id": "test",
"private_key_id": "test",
"private_key": "test",
"client_email": "test@gmail.com",
"client_id": "test",
"auth_uri": "https://accounts.google.com/o/oauth2/auth",
"token_uri": "https://oauth2.googleapis.com/token",
"auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
"client_x509_cert_url": "test",
"universe_domain": "googleapis.com"
}

We have included all the dependencies as mentioned below for the google oauth2.

<!-- https://mvnrepository.com/artifact/com.google.auth/google-auth-library-oauth2-http -->
<dependency>
    <groupId>com.google.auth</groupId>
    <artifactId>google-auth-library-oauth2-http</artifactId>
    <version>1.39.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>33.5.0-jre</version>
</dependency>

<!-- https://mvnrepository.com/artifact/com.google.http-client/google-http-client-gson -->
<dependency>
    <groupId>com.google.http-client</groupId>
    <artifactId>google-http-client-gson</artifactId>
    <version>1.47.1</version>
</dependency>

<!-- https://mvnrepository.com/artifact/com.google.http-client/google-http-client-jackson2 -->
<dependency>
    <groupId>com.google.http-client</groupId>
    <artifactId>google-http-client-jackson2</artifactId>
    <version>1.47.1</version>
</dependency>

<!-- https://mvnrepository.com/artifact/com.google.http-client/google-http-client -->
<dependency>
    <groupId>com.google.http-client</groupId>
    <artifactId>google-http-client</artifactId>
    <version>1.47.1</version>
</dependency>


<!-- For Maven (pom.xml) -->
<dependency>
    <groupId>io.opencensus</groupId>
    <artifactId>opencensus-api</artifactId>
    <version>0.31.1</version> <!-- Use the latest stable version -->
</dependency>

<!-- https://mvnrepository.com/artifact/com.google.api-client/google-api-client -->
<dependency>
    <groupId>com.google.api-client</groupId>
    <artifactId>google-api-client</artifactId>
    <version>2.7.2</version>
</dependency>

<dependency>
    <groupId>org.htmlunit</groupId>
    <artifactId>htmlunit-csp</artifactId>
    <version>3.10.0</version>
    <scope>compile</scope>
</dependency>
<dependency>
    <groupId>org.htmlunit</groupId>
    <artifactId>htmlunit-csp</artifactId>
    <version>3.10.0</version>
    <scope>compile</scope>

 In the code we are trying to fetch the idToken of google oauth2 after reading the json values as InputStream :-

try (InputStream serviceAccountStream = getClass().getResourceAsStream("/test.json")) {
GoogleCredentials credentials = GoogleCredentials.fromStream(serviceAccountStream)
.createScoped(Collections.singletonList("https://www.googleapis.com/auth/cloud-platform"));

serviceAccountCredentials = (ServiceAccountCredentials) credentials;

IdTokenCredentials tokenCredentials = IdTokenCredentials.newBuilder()
.setIdTokenProvider((IdTokenProvider) serviceAccountCredentials)
.setTargetAudience(url)
.build();

// Get the token
tokenCredentials.refresh();
String idToken = tokenCredentials.getIdToken().getTokenValue();

}catch (Exception e) {
LOG.info(e.getMessage());
}

We are getting the error in the GoogleCredentials Object