code: def handle_exception(self, exc):
          
          if isinstance(exc, (exceptions.NotAuthenticated,
                              exceptions.AuthenticationFailed)):
              # WWW-Authenticate header for 401 responses, else coerce to 403
              auth_header = self.get_authenticate_header(self.request)
  
              if auth_header:
                  exc.auth_header = auth_header
              else:
                  exc.status_code = status.HTTP_403_FORBIDDEN
  
          exception_handler = self.settings.EXCEPTION_HANDLER
  
          context = self.get_exception_handler_context()
          response = exception_handler(exc, context)
  
          if response is None:
              raise
  
          response.exception = True
          return response
docs: Handle any exception that occurs, by returning an appropriate response,
          or re-raising the error.