public function deleteServerToken ( $consumer_key, $token, $user_id, $user_is_admin = false )
	{
		if ($user_is_admin)
		{
			$this->query('
				DELETE oauth_consumer_token 
				FROM oauth_consumer_token
						JOIN oauth_consumer_registry
						ON oct_ocr_id_ref = ocr_id
				WHERE ocr_consumer_key	= \'%s\'
				  AND oct_token			= \'%s\'
				', $consumer_key, $token);
		}
		else
		{
			$this->query('
				DELETE oauth_consumer_token 
				FROM oauth_consumer_token
						JOIN oauth_consumer_registry
						ON oct_ocr_id_ref = ocr_id
				WHERE ocr_consumer_key	= \'%s\'
				  AND oct_token			= \'%s\'
				  AND oct_usa_id_ref	= %d
				', $consumer_key, $token, $user_id);
		}
	}