<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def on_api_error_15(self, request):
 """ 15. Access denied - due to scope """

        logger.error('Authorization failed. Access token will be dropped')
        self.access_token = self.get_access_token()
        return self.send(request)