public void ChangePassword(Guid Id, string password)
{
if (password == null)
{
throw new ArgumentNullException(nameof(password));
}
if (string.IsNullOrWhiteSpace(password))
{
throw new ArgumentException("Value cannot be empty or whitespace only string.", nameof(password));
}
byte[] passwordHash, passwordSalt;
CreatePasswordHash(password, out passwordHash, out passwordSalt);
_userops.ChangePassword(Id, password, passwordHash, passwordSalt);
}