$user_array = array(
			'email'				=> 'admin@mydomain.com',
			'password'			=> 'password',
			'password_confirm'	=> 'password',
			'username'			=> 'admin'
		);
		
		$user = new User_Model;
		
		$user->add(ORM::factory('role', 'login'));
		
		// Validate and save
		if ($user->validate($user_array, TRUE))
		{
			echo 'User added succesfully';
		}
		else
		{
			echo Kohana::debug($user_array->errors());
		}