'Constructs a CredentialContext
:param sid: The sid
:returns: twilio.rest.api.v2010.account.sip.credential_list.credential.CredentialContext
:rtype: twilio.rest.api.v2010.account.sip.credential_list.credential.CredentialContext'

def __call__(self, sid):

    return CredentialContext(self._version, account_sid=self._solution['account_sid'], credential_list_sid=self._solution['credential_list_sid'], sid=sid)
