public function checkData(array $data) 
	{
		$keys = array('to', 'fullname', 'title', 'activationLink', 'siteurl', 'cdnurl', 'siteName');
		
		foreach($keys as $key) {
			if(!array_key_exists($key, $data)) {
				throw new \Exception('Key not in data');
			}
		}
		
		return $this;
	}