code: def add_email_addresses(self, addresses=[]):
          
          json = []
          if addresses:
              url = self._build_url('user', 'emails')
              json = self._json(self._post(url, data=addresses), 201)
          return json
docs: Add the email addresses in ``addresses`` to the authenticated
          user's account.
  
          :param list addresses: (optional), email addresses to be added
          :returns: list of email addresses