salix/modules/client/back/models/receipt.js

module.exports = function(Self) {
    require('../methods/receipt/filter')(Self);

    Self.observe('before save', async function(ctx) {
        if (ctx.isNewInstance) {
            let token = ctx.options.accessToken;
            let userId = token && token.userId;
            let worker = await Self.app.models.Worker.findOne({where: {userFk: userId}});

            ctx.instance.workerFk = worker.id;
        }
    });
};