How to call ResolveCustomer and GetEntitlements from aws-marketplace?

I found the Java package but I can't find a usage example.

I need to call ResolveCustomer (produces a token for the product and user) and GetEntitlements (gives a list of rights for the product and the user).

Has anyone used this service?

Here is full example to get information about client from AWS marketplace. You should to use these libraries:

 <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk-marketplacemeteringservice</artifactId>
            <version>1.11.192</version>
        </dependency>
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk-marketplaceentitlement</artifactId>
            <version>1.11.194</version>
        </dependency>

        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.2</version>
        </dependency>

Java code:

import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSCredentialsProvider;
import com.amazonaws.services.marketplaceentitlement.AWSMarketplaceEntitlementClient;
import com.amazonaws.services.marketplaceentitlement.AWSMarketplaceEntitlementClientBuilder;
import com.amazonaws.services.marketplaceentitlement.model.GetEntitlementsRequest;
import com.amazonaws.services.marketplaceentitlement.model.GetEntitlementsResult;
import com.amazonaws.services.marketplacemetering.*;
import com.amazonaws.services.marketplacemetering.model.*;
import org.junit.Test;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

public class R
{
    @Test
    public void test() throws Exception
    {
        AWSCredentialsProvider provider = new AWSCredentialsProvider()
        {
            public AWSCredentials getCredentials()
            {
                return new AWSCredentials()
                {
                    public String getAWSAccessKeyId()
                    {
                        return "<YOUR ACCESS KEY>";
                    }

                    public String getAWSSecretKey()
                    {
                        return "YOUR SECRET KEY";
                    }
                };
            }

            public void refresh()
            {

            }
        };


        AWSMarketplaceMeteringClientBuilder b = AWSMarketplaceMeteringClient.builder();
        b.setRegion("us-east-1");  // YOUR AWS REGION
        b.setCredentials(provider);
        AWSMarketplaceMetering c = b.build();

        ResolveCustomerRequest r = new ResolveCustomerRequest();
        r.setRegistrationToken(<YOUR "x-amzn-marketplace-token">); // it comes to your application in the url parameter when the user clicks the buy button in the aws market
        final ResolveCustomerResult response = c.resolveCustomer(r);


        AWSMarketplaceEntitlementClientBuilder entitlementClientBuilder = AWSMarketplaceEntitlementClient.builder();
        entitlementClientBuilder.setRegion("us-east-1");
        entitlementClientBuilder.setCredentials(provider);

        GetEntitlementsRequest getEntitlementsRequest = new GetEntitlementsRequest();
        getEntitlementsRequest.setProductCode(response.getProductCode());

        getEntitlementsRequest.setFilter(new HashMap<String, List<String>>()
        {{
            put("CUSTOMER_IDENTIFIER", new ArrayList<String>()
            {{
                add(response.getCustomerIdentifier());
            }});
        }});
        GetEntitlementsResult entitlementsResult = entitlementClientBuilder.build().getEntitlements(getEntitlementsRequest);
        entitlementsResult = null;
    }
}

Also you should add this policy in your AWS account: