public async Task <bool> RegisterUserAsync(ApplicationUser model)
{
var salt = PasswordHashHelper.GenerateSalt();
var passwordHash = PasswordHashHelper.ComputeHash(model.Password, salt);
model.Salt = Convert.ToBase64String(salt);
model.Password = Convert.ToBase64String(passwordHash);
var isRegistrationSuccessful = await _repo.AddAsync(model);
return(isRegistrationSuccessful ? true : false);
}