@property<EOL><INDENT>def credential_lists(self):<DEDENT>
if self._credential_lists is None:<EOL><INDENT>self._credential_lists = CredentialListList(<EOL>self._version,<EOL>account_sid=self._solution['<STR_LIT>'],<EOL>)<EOL><DEDENT>return self._credential_lists<EOL>
Access the credential_lists

:returns: twilio.rest.api.v2010.account.sip.credential_list.CredentialListList
:rtype: twilio.rest.api.v2010.account.sip.credential_list.CredentialListList