public void CancelCustomersSubscription_Test()
{
_client.UpdateCustomersSubscription(_customer.Id, _subscription.Id, _plan.Id);
dynamic response = _client.CancelCustomersSubscription(_customer.Id, _subscription.Id);
Assert.NotNull(response);
Assert.False(response.IsError);
Assert.NotNull(response.CanceledAt);
Assert.NotNull(response.EndedAt);
}