Rocket.Chat/app/tokenpass/server/methods/getChannelTokenpass.js

import { Meteor } from 'meteor/meteor';
import { check } from 'meteor/check';

import { Rooms } from '../../../models';

Meteor.methods({
	getChannelTokenpass(rid) {
		check(rid, String);

		if (!Meteor.userId()) {
			throw new Meteor.Error('error-invalid-user', 'Invalid user', { method: 'getChannelTokenpass' });
		}

		const room = Rooms.findOneById(rid);

		if (!room) {
			throw new Meteor.Error('error-invalid-room', 'Invalid room', { method: 'getChannelTokenpass' });
		}

		return room.tokenpass;
	},
});