static get idAttribute() {
        if (typeof this._session === "undefined") {
            throw new Error(
                [
                    `Tried to get the ${this.modelName} model's id attribute without a session. `,
                    "Create a session using `session = orm.session()` and access ",
                    `\`session["${this.modelName}"].idAttribute\` instead.`,
                ].join("")
            );
        }
        return this.session.db.describe(this.modelName).idAttribute;
    }
Returns the id attribute of this {@link Model}.

@return {string} The id attribute of this {@link Model}.