code: def token_endpoint(self, context):
          
          headers = {"Authorization": context.request_authorization}
          try:
              response = self.provider.handle_token_request(urlencode(context.request), headers)
              return Response(response.to_json(), content="application/json")
          except InvalidClientAuthentication as e:
              logger.debug('invalid client authentication at token endpoint', exc_info=True)
              error_resp = TokenErrorResponse(error='invalid_client', error_description=str(e))
              response = Unauthorized(error_resp.to_json(), headers=[("WWW-Authenticate", "Basic")],
                                      content="application/json")
              return response
          except OAuthError as e:
              logger.debug('invalid request: %s', str(e), exc_info=True)
              error_resp = TokenErrorResponse(error=e.oauth_error, error_description=str(e))
              return BadRequest(error_resp.to_json(), content="application/json")
docs: Handle token requests (served at /token).
          :type context: satosa.context.Context
          :rtype: oic.utils.http_util.Response
  
          :param context: the current context
          :return: HTTP response to the client