code: def get(self, sid):
          
          return CredentialListContext(self._version, account_sid=self._solution['account_sid'], sid=sid, )
docs: Constructs a CredentialListContext
  
          :param sid: Fetch by unique credential list Sid
  
          :returns: twilio.rest.api.v2010.account.sip.credential_list.CredentialListContext
          :rtype: twilio.rest.api.v2010.account.sip.credential_list.CredentialListContext