public async Task <Tuple <bool, ErrorMessage> > UpdateEmail(int accountId, string newEmail)
{
if (!await _validationService.UserExists(accountId))
{
return(new Tuple <bool, ErrorMessage>(false, ErrorMessage.UserDoesNotExist));
}
await _userAccountService.ChangeEmail(accountId, newEmail);
return(new Tuple <bool, ErrorMessage>(true, ErrorMessage.None));
}