enrichLoginToken.js

const enrichLoginToken = (userId, userAgent) => {
	const user = Meteor.users.findOne(userId);
	
	if (!user) {
		return console.log(`User ${userId} not found`);
	}

	const loginTokens = user?.services?.resume?.loginTokens;

	if (loginTokens && loginTokens.length !== 0) {
		return console.log(`User ${userId} does not have any login tokens`);
	}

	// Get the latest login token
	const lastLoginToken = loginTokens[loginTokens.length - 1];

	// Enrich it with some extra fields
	const updatedLoginToken = {
		userAgent: userAgent,
		sessionId: Random.id(),
		createdAt: new Date(),
		...lastLoginToken
	};

	// Replace the latest login token with the updated one
	loginTokens[loginTokens.length - 1] = updatedLoginToken;

	Meteor.users.update(userId, {
		$set: {
			'services.resume.loginTokens': loginTokens
		}
	});
}

Accounts.onLogin(function(info) {
	const userId = info.user._id;
	const userAgent = info.connection['user-agent']
  	enrichLoginToken(userId, userAgent)
});