public async Task <bool> AddAsync(SubscriberModel subsciber, float height)
{
var isExsits = _subscriberRepository.IsEmailExistsAsync(subsciber.email);
if (isExsits.Result == false)
{
await _subscriberRepository.AddAsync(subsciber, height);
return(true);
}
throw new Exception("this email exists, try another");
}