Find a single document by its id in collection.
const model = data.model('foo', {name: String});
// Find first document
await data.findOne(model);
// Find nth document
await data.findOne(model, 50);
// Find document by query
await data.findOne(model, {name: 'Joe'});- string
Promise<DataDocument>
## Find by id
View Ids for more information.