var manager = new ManagementApi(amazonLoginAccessToken);
var skillDetail = manager.Skills.Get(skillId);
var skillPublishingInformation = skillDetail.Manifest.PublishingInformation.Locales.First().Value;
var skillName = skillPublishingInformation.Name;

var manager = new ManagementApi(amazonLoginAccessToken);
var vendors = await manager.Vendors.Get()

var beta = await manager.Beta.Create(skillId,"feedbackemail@example.com")
await manager.Beta.AddTesters(skillId,new[]{"test1@example.com","test2@example.com"})