Forgot how to connect using API

It's been a while since I ran my DOMO client using Java.

I tried Listing my datasets and I get the following errors:

Error making request url:https://api.domo.com/v1/datasets?limit=50&offset=0

PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Here is the Code I for my Client:

public class DomoCredentials {

	public final String clientID = "xxxxxxxxxxxxxxx";
	public final String secret = "xxxxxxxxxxxxxxx";
	public final String scope = "data";
	public final String applicationName = "ApplicationName";

	public final String csv_export_endpoint = "https://api.domo.com/v1/datasets/";
	public DomoClient domoClient;

	public DomoCredentials(){
		init();
	}

	public void init(){
		Config config = Config.with().clientId(this.clientID).clientSecret(this.secret)
				.apiHost("api.domo.com")
				.useHttps(true)
				.scope(Scope.DATA)
				.httpLoggingLevel(HttpLoggingInterceptor.Level.BODY)
				.build();

		this.domoClient = DomoClient.create(config);
	}

What am I forgetting here?