Cannot use persistence methods

[svenyonson]

persistence.* methods are unavailable in Datastore object.

    var Datastore = require("nedb-async-await").Datastore;
    var db = {}
    db.users = new Datastore({ filename: './nedb/users.db', autoload: true });
    db.users.persistence.setAutocompactionInterval(24*60*60*1000)

Error:
db.users.persistence.setAutocompactionInterval(246060*1000)
^
TypeError: Cannot read property 'setAutocompactionInterval' of undefined