Add a backdoor object to CRITs.

        Args:
            backdoor_name: The primary name of the backdoor
            source: Source of the information
            reference: A reference where more information can be found
            method: The method for obtaining the backdoor information.
            aliases: List of aliases for the backdoor.
            version: Version
            campaign: An associated campaign
            confidence: The campaign confidence
            description: A description of the email
            bucket_list: A list of bucket list items to add

def add_backdoor(self,
                     backdoor_name,
                     source,
                     reference,
                     method='',
                     aliases=[],
                     version='',
                     campaign='',
                     confidence='',
                     description='',
                     bucket_list=[]):
        """
        Add a backdoor object to CRITs.

        Args:
            backdoor_name: The primary name of the backdoor
            source: Source of the information
            reference: A reference where more information can be found
            method: The method for obtaining the backdoor information.
            aliases: List of aliases for the backdoor.
            version: Version
            campaign: An associated campaign
            confidence: The campaign confidence
            description: A description of the email
            bucket_list: A list of bucket list items to add
        """
        data = {
            'api_key': self.api_key,
            'username': self.username,
            'source': source,
            'reference': reference,
            'method': method,
            'name': backdoor_name,
            'aliases': ','.join(aliases),
            'version': version,
            'campaign': campaign,
            'confidence': confidence,
            'bucket_list': bucket_list,
            'description': description,
        }
        r = requests.post('{0}/backdoors/'.format(self.url),
                          data=data,
                          verify=self.verify,
                          proxies=self.proxies)
        if r.status_code == 200:
            result_data = json.loads(r.text)
            return result_data
        else:
            log.error('Error with status code {0} and message '
                      '{1}'.format(r.status_code, r.text))
        return None