You should also pass an error handler. 

```js
learners.find({...})
  .error(function (){...})
  .success(function () {...});

// OR it might be easier to store the promise-like object:

const learnerLookup = learners.find({ ... });
learnerLookup.error(function (){...});
learnerLookup.success(function() {...});
```

NOTE: I really dislike that sequelize uses a "not-exactly-promises" API instead of callbacks like most other sane libraries.