public async Task <Administrator> AddNewAdministratorcAsync(string firstName, string lastName, string email, string password)
{
if (!validator.ValidateEmail(email) || !validator.ValidatePasswordLength(password))
{
throw new ArgumentException();
}
var newAdmin = new Administrator()
{
Id = Guid.NewGuid(),
FirstName = firstName,
LastName = lastName,
Email = email,
Password = password
};
await administratorRepository.AddNewAdministratorAsync(newAdmin);
return(newAdmin);
}