If you mean, `this.fullName` or `this.username`, this:

(from sequelizejs.com)

`N.B.: It is important to stick to using the setDataValue() and getDataValue() functions (as opposed to accessing the underlying "data values" property directly) - doing so protects your custom getters and setters from changes in the underlying model implementations (i.e. how and where data values are stored in your model instances)`