public Task<Customer> GetResellerAsync()
{
string uri = string.Format("{0}/customers/get-by-identity?provider=AAD&type=tenant&tid={1}", cspApiUrl, reseller_id);
APIService service = new APIService(uri);
service.Request.Headers.Add("api-version", "2015-03-31");
service.Request.Headers.Add("x-ms-correlation-id", Guid.NewGuid().ToString());
service.Request.Headers.Add("x-ms-tracking-id", Guid.NewGuid().ToString());
service.Request.Headers.Add("Authorization", "Bearer " + sa_token.access_token);
return service.GetAsync<Customer>();
}