Could not create connection from Spring Boot app to Google Cloud SQL (mySQL)

I am trying to connect a Spring Boot application to a Cloud SQL database and I keep getting the same error.
The stacktrace:

com.zaxxer.hikari.pool.HikariPool$PoolInitializationException: Failed to initialize pool: Could not create connection to database server.
 at com.zaxxer.hikari.pool.HikariPool.throwPoolInitializationException(HikariPool.java:596)
 at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:582)
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 ... 74 more
Caused by: java.lang.RuntimeException: Unable to obtain credentials to communicate with the Cloud SQL API
 at com.google.cloud.sql.core.CoreSocketFactory$ApplicationDefaultCredentialFactory.create(CoreSocketFactory.java:392)
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Caused by: java.io.IOException: The Application Default Credentials are not available. They are available if running in Google Compute Engine. Otherwise, the environment variable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defining the credentials. See [delete the link because of spam detection] for more information.
 at com.google.auth.oauth2.DefaultCredentialsProvider.getDefaultCredentials(DefaultCredentialsProvider.java:125)
 at com.google.auth.oauth2.GoogleCredentials.getApplicationDefault(GoogleCredentials.java:125)
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 ... 91 more

Dependencies:

		<dependency>
        	<groupId>com.google.cloud</groupId>
        	<artifactId>spring-cloud-gcp-dependencies</artifactId>
        	<version>3.3.0</version>
        	<type>pom</type>
       		<scope>import</scope>
        </dependency>

		<dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP</artifactId>
			<version>5.0.1</version>
        </dependency>

		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>8.0.31</version>
			<scope>runtime</scope>
		</dependency>
		
		<dependency>
    		<groupId>com.google.cloud.sql</groupId>
    		<artifactId>mysql-socket-factory</artifactId>
    		<version>1.11.0</version>
		</dependency>

		<dependency>
    		<groupId>org.springframework.cloud</groupId>
    		<artifactId>spring-cloud-openfeign-core</artifactId>
    		<version>4.0.1</version>
		</dependency>

Configuration class:

@Configuration
public class DatabaseConfig {

    @Bean
    public static DataSource dataSource() {
        HikariConfig config = new HikariConfig();
        config.setJdbcUrl(String.format("jdbc:mysql://google/%s", <database-name>));
        config.setUsername(<username>);
        config.setPassword(<password>);
        config.setMaximumPoolSize(5);
        config.addDataSourceProperty("socketFactory", "com.google.cloud.sql.mysql.SocketFactory");
        config.addDataSourceProperty("cloudSqlInstance", "<project-id>:<location>:<instance-name>");

        return new HikariDataSource(config);
    }
}

1. I checked for the configuration. I tried to add many configurations that I saw on similar threads, but the test still remains the same result. So I delete them and only keep the part from the Google Cloud Guide.
   One thing I do want to make sure is that <database-name> is under the databases section of SQL console. Is it the one that same as "USE <database-name>" when I try to execue SQL commands on the cloud shell?

2. I checked for the database setting. I made sure the database is working and I can perform SQL commands using the same username and password. The database allows only public access. I have enabled the sqladmin API.

3. I tried adding different dependencies I saw on similar threads but it didn't change anything either so I deleted some of them. Actually I am not sure if the dependencies I have now are correct. Please let me know if they are wrong.

4.I checked for the code I have, but basically I just creating the jdbcTemplate using the datasource from the configuration class, and then I call queryForObject using this jdbcTemplate. From the error msg, I think the code itself is correct.

You'll need to configure Application Default Credentials, which is how the Java Connector makes Cloud SQL Admin API calls. This step is separate from authenticating with your database.