RocketChat/Rocket.Chat

import { Users } from '@rocket.chat/models';
import { Accounts } from 'meteor/accounts-base';
import { check } from 'meteor/check';

Accounts.registerLoginHandler('login-token', async (result) => {
    if (!result.loginToken) {
        return;
    }

    check(result.loginToken, String);

    const user = await Users.findOne({
        'services.loginToken.token': result.loginToken,
    });

    if (user) {
        await Users.updateOne({ _id: user._id }, { $unset: { 'services.loginToken': 1 } });

        return {
            userId: user._id,
        };
    }
});