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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create(self, ttl=values.unset):
 """ Create a new TokenInstance :param unicode ttl: The duration in seconds the credentials are valid :returns: Newly created TokenInstance :rtype: twilio.rest.api.v2010.account.token.TokenInstance """

        data = values.of({'Ttl': ttl, })

        payload = self._version.create(
            'POST',
            self._uri,
            data=data,
        )

        return TokenInstance(self._version, payload, account_sid=self._solution['account_sid'], )