func NewMetadataClient() *MetadataClient {
	return &MetadataClient{
		client: &http.Client{},
		URL:    `http: 
	}
}
NewMetadataClient returns an instance of a MetadataClient
package aws
import (
	"fmt"
	"io/ioutil"
	"net/http"
)
type MetadataClient struct {
	client *http.Client
	URL    string
}