How to config Springboot with Google cloud platform API vesion

Question

I am building springboot application that uses Google Cloud Platform Vision API, to use Google cloud platform, the credentials is required so I am trying to configure it but it does not talk it and talk the credentials way in the code, I want to use the credentials that into application.properties, how to do that?

Configuration class

@Configuration
public class VisionConfiguration {


    @Bean
    public CloudVisionTemplate cloudVisionTemplate() throws IOException {
        Credentials credentials = new Credentials();
        return new CloudVisionTemplate(imageAnnotatorClient(new DefaultCredentialsProvider(() -> credentials)));
    }

    @Bean
    ImageAnnotatorClient imageAnnotatorClient(CredentialsProvider credentialsProvider) throws IOException {
        ImageAnnotatorSettings settings = ImageAnnotatorSettings
                .newBuilder()
                .setCredentialsProvider(credentialsProvider)
                .build();
        return ImageAnnotatorClient.create(settings);
    }

}

application.properties

spring.cloud.gcp.credentials.location=credentials.json

and I put the credentials json file under resource folder

could any one help?