code: def get_activitylog(self, after=None, severity=None, start=None, end=None):
          
          if after:
              log_raw = self._router.get_instance_activitylog(org_id=self.organizationId,
                                                              instance_id=self.instanceId,
                                                              params={"after": after}).json()
          else:
              log_raw = self._router.get_instance_activitylog(org_id=self.organizationId,
                                                              instance_id=self.instanceId).json()
  
          return ActivityLog(log_raw, severity=severity, start=start, end=end)
docs: Returns activitylog object
          severity - filter severity ('INFO', DEBUG')
          start/end - time or log text