Я нашел рабочее решение:
function (user, context, callback) {
const namespace = 'https://myapp.example.com/';
var ManagementClient = require('auth0@2.19.0').ManagementClient;
var management = new ManagementClient({
token: auth0.accessToken,
domain: auth0.domain
});
management.getUser(user.user_id)
.then(function(users){
context.accessToken[namespace + 'last_ip'] = users[0].last_ip;
context.accessToken[namespace + 'last_login'] = users[0].last_login;
callback(null, user, context);
})
.catch(function(err){
callback(err);
});
}