/// <inheritdoc/>
/// <exception cref="InvalidEmailException">Thrown if the user's email address is invalid or already exists in the database.</exception>
/// <exception cref="InvalidPasswordException">Thrown if the password is too weak.</exception>
public async Task AddUserAsync(UserToCreate user)
{
userValidationService.ValidateUserToCreate(user);
string hash = passwordService.SaltAndHashPassword(user.Password);
await addUserProvider.AddUserAsync(user.Email, hash);
}