FireStoreConfig.java

@Configuration
public class FireStoreConfig {
	@Bean
	public Firestore getFireStore(@Value("${firebase.credential.path}") String credentialPath) throws IOException {
		var serviceAccount = new FileInputStream(credentialPath);
		var credentials = GoogleCredentials.fromStream(serviceAccount);

		var options = FirestoreOptions.newBuilder()
						.setCredentials(credentials).build();

		return options.getService();
	}
}