[FIXED] Java Cannot access com.google.auth.Credentials

Issue

I am developing a simple JavaFx application for a client using Firebase.

This application worked perfectly without JavaFx, however I had to re-create this project to get JavaFx working with it (simply adding dependencies didn't work).

I know this question is a possible duplicate, but I have tried almost all methods suggested before. (linked the ones I tried below)

When using GoogleCredentials, the application throws this error:

java: cannot access com.google.auth.Credentials
  class file for com.google.auth.Credentials not found

This is the class that has the method: (See the private constructor)

public class DataManage {
    private FirebaseOptions options;
    private Firestore firestore;
    private FirebaseAuth mAuth;

    public static DataManage getInstance() {
        return Holder.INSTANCE;
    }

    public void initApp() {
        FirebaseApp.initializeApp(options);
    }

    public UserRecord getUserInfo(String email) {
        try {
            return mAuth.getUserByEmail(email);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public void getUserDataFromDate(String email, Date date) {
        try {
            //Todo add stuff later
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /// I call the GoogleCredentials.fromStream() method here
    private DataManage() {
        try {
            FileInputStream inputStream = new FileInputStream("service-account.json");

            options = FirebaseOptions.builder()
                    .setCredentials(GoogleCredentials.fromStream(inputStream))
                    .setDatabaseUrl("https://attendance-349db.firebaseio.com/")
                    .build();

            FirebaseApp.initializeApp(options);

            firestore = FirestoreClient.getFirestore();
            mAuth = FirebaseAuth.getInstance();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static class Holder {
        private static final DataManage INSTANCE = new DataManage();
    }
}

This is my maven dependency file: (only including the dependencies and part of build to avoid cluttering)

Dependencies:

<dependencies>
        <dependency>
            <groupId>com.google.firebase</groupId>
            <artifactId>firebase-admin</artifactId>
            <version>8.1.0</version>
            <exclusions>
                <exclusion>
                    <groupId>com.google.oauth-client</groupId>
                    <artifactId>google-oauth-client</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-controls</artifactId>
            <version>17-ea+11</version>
        </dependency>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-fxml</artifactId>
            <version>17-ea+11</version>
        </dependency>

        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

Build:

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>17</source>
                    <target>17</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.openjfx</groupId>
                <artifactId>javafx-maven-plugin</artifactId>
                <version>0.0.6</version>
                <executions>
                    <execution>
                        <!-- Default configuration for running with: mvn clean javafx:run -->
                        <id>default-cli</id>
                        <configuration>
                            <mainClass>com.indo.attendanceserver/com.indo.attendanceserver.Main</mainClass>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

My modules:

module com.indo.attendanceserver {
    requires javafx.controls;
    requires javafx.fxml;
    requires firebase.admin;
    requires google.cloud.firestore;
    requires com.google.auth.oauth2;


    opens com.indo.attendanceserver to javafx.fxml;
    exports com.indo.attendanceserver;
    exports com.indo.attendanceserver.scenes.intro;
    opens com.indo.attendanceserver.scenes.intro to javafx.fxml;
    exports com.indo.attendanceserver.scenes.user;
    opens com.indo.attendanceserver.scenes.user to javafx.fxml;
}

Here are the links to suggestions that I've tried but didn't work:

No app-engine files in my project.

Excluding didn't help, tried without excluding too

Latest version for both

No updates from this person

Any help is greatly appreciated.

Solution

I've managed to fix this issue.

All I had to do was add

requires com.google.auth;

to my module-info.java file.

The final file looks something like this:

module com.indo.attendanceserver {
    requires javafx.controls;
    requires javafx.fxml;
    requires firebase.admin;
    requires google.cloud.firestore;
    requires com.google.auth.oauth2;
    requires com.google.auth;



    opens com.indo.attendanceserver to javafx.fxml;
    exports com.indo.attendanceserver;
    exports com.indo.attendanceserver.scenes.intro;
    opens com.indo.attendanceserver.scenes.intro to javafx.fxml;
    exports com.indo.attendanceserver.scenes.user;
    opens com.indo.attendanceserver.scenes.user to javafx.fxml;
}

I hope this helps anyone who is looking for an answer.

Answered By - Habba Inoba
Answer Checked By - Gilberto Lyons (JavaFixing Admin)