private static Connection getDBConnectionUsingIam()
{
    String jdbcUrl = "jdbc:mysql://" + rds_instance_endpoint;
Properties mysqlConnectionProperties = new Properties();
    mysqlConnectionProperties.setProperty("verifyServerCertificate", "true");
    mysqlConnectionProperties.setProperty("useSSL", "true");
System.setProperty("javax.net.ssl.trustStore","path_to_truststore");
    System.setProperty("javax.net.ssl.trustStorePassword","trustore_password");
mysqlConnectionProperties.setProperty("user", "iam-database-user");

    // Call a method to generate an authentication token (see above example)
    String authToken = generateAuthToken();
// Set authentication token as password
    mysqlConnectionProperties.setProperty("password", authToken);
Connection connection = DriverManager.getConnection(jdbcUrl, mysqlConnectionProperties);
}