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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_token_response(self, request, token_handler):
 """Validate the authorization code. The client MUST NOT use the authorization code more than once. If an authorization code is used more than once, the authorization server MUST deny the request and SHOULD revoke (when possible) all tokens previously issued based on that authorization code. The authorization code is bound to the client identifier and redirection URI. :param request: OAuthlib request. :type request: oauthlib.common.Request :param token_handler: A token handler instance, for example of type oauthlib.oauth2.BearerToken. """

        headers = self._get_default_headers()
        try:
            self.validate_token_request(request)
            log.debug('Token request validation ok for %r.', request)
        except errors.OAuth2Error as e:
            log.debug('Client error during validation of %r. %r.', request, e)
            headers.update(e.headers)
            return headers, e.json, e.status_code

        token = token_handler.create_token(request, refresh_token=self.refresh_token)

        for modifier in self._token_modifiers:
            token = modifier(token, token_handler, request)

        self.request_validator.save_token(token, request)
        self.request_validator.invalidate_authorization_code(
            request.client_id, request.code, request)
        return headers, json.dumps(token), 200