salix/back/methods/vn-user/validate-token.js

const {models} = require('vn-loopback/server/server');
module.exports = Self => {
    Self.remoteMethod('validateToken', {
        description: 'Validates the current logged user token',
        returns: {
            type: 'Boolean',
            root: true
        },
        http: {
            path: `/validateToken`,
            verb: 'GET'
        }
    });

    Self.validateToken = async function(token) {
        const accessTokenConfig = await models.AccessTokenConfig.findOne({fields: ['renewPeriod', 'courtesyTime']});
        const now = Date.now();
        const differenceMilliseconds = now - token.created;
        const differenceSeconds = Math.floor(differenceMilliseconds / 1000);
        const isValid = differenceSeconds < accessTokenConfig.renewPeriod - accessTokenConfig.courtesyTime;

        return isValid;
    };
};