salix/back/models/authCode.js

const models = require('vn-loopback/server/server').models;
const maxTTL = ((60 * 1000) * 5); // 5 min

module.exports = authCode = async(vnUser, options) => {
    const myOptions = {};

    if (typeof options == 'object')
        Object.assign(myOptions, options);

    const code = String(Math.floor(Math.random() * 999999));
    await models.AuthCode.upsertWithWhere({userFk: vnUser.id}, {
        userFk: vnUser.id,
        code,
        expires: Date.vnNow() + maxTTL
    }, myOptions);
    return code;
};